Multilayer Varistor

Abstract

The purpose of the present disclosure is to obtain a laminated varistor in which crosstalk occurring between external terminals is suppressed. A first opposed section (14) and a second opposed section (18) are provided inside a cuboid-shaped sintered body (11), which has a first direction as a long side, so as to sandwich a third opposed section (22). A first external electrode (12) that connects to the first opposed section (14), a second external electrode (16) that connects to the second opposed section (18), and a third external electrode (20) and a fourth external electrode (24) that connect to the third opposed section (22) are provided to at least one of a first side surface (S21) and a second side surface (S22). In the first direction, the third external electrode (20) and the fourth external electrode (24) are provided between the first external electrode (12) and the second external electrode (16).

Description

[Technical Field]

[0001] The present invention relates to a multilayer varistor used in various electronic devices. [Background technology]

[0002] In recent years, the miniaturization of home appliances and in-vehicle electronic devices has progressed, and so has the demand for miniaturization of the varistors that are components of these devices. Furthermore, as the frequency of circuits in which varistors are used increases, the capacitance of the varistor may affect performance (the surge absorption performance of the varistor). For this reason, there is a demand for varistors that have a small capacitance and small variation while maintaining a specified varistor voltage. Furthermore, when using varistors in pairs, it has been proposed to form two varistors in a single element in order to reduce the difference in capacitance between the pair. Patent Document 1, for example, is known as a prior art document related to the invention of this application.

[0003] In conventional multilayer varistors, external electrodes connected to signal lines are placed at both ends, with an external terminal serving as a common terminal located between them and connected to ground. However, when attempting to place a varistor on a balanced line and connect it to each signal line, the signal line, which serves as a balanced line, must be bent, which can easily disrupt the balance. Conversely, arranging the external terminals connected to the balanced terminals in the center makes it easier for coupling to occur between signal lines within the laminate, making crosstalk more likely to occur. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 07-235406 Summary of the Invention

[0005] An object of the present disclosure is to suppress the occurrence of crosstalk.

[0006] A multilayer varistor according to one aspect of the present disclosure comprises a sintered body, a first internal electrode, a second internal electrode, a third internal electrode, a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode. The sintered body has a first end face and a second end face facing each other in a first direction, a first side face and a second side face facing each other in a second direction, and a first main face and a second main face facing each other in a third direction. The sintered body is formed in a rectangular parallelepiped shape with long sides in the first direction, and has a laminated structure in which a plurality of layers are laminated along the third direction. The first internal electrode is provided on a first lamination surface within the sintered body. The second internal electrode is provided on a second lamination surface within the sintered body that is different from the first lamination surface. The third internal electrode is provided on a third lamination surface between the first lamination surface and the second lamination surface within the sintered body. The first external electrode is provided on at least one of the first side face and the second side face, and is electrically connected to the first internal electrode. The second external electrode is provided on at least one of the first side surface and the second side surface and is electrically connected to the second internal electrode. The third external electrode and the fourth external electrode are provided on at least one of the first side surface and the second side surface and are electrically connected to the third internal electrode. The third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction. The first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion. The second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion. The third internal electrode has a third opposing portion. In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion. In the first direction, the first external electrode and the second external electrode are provided between the third external electrode and the fourth external electrode. The first external electrode includes a first electrode provided on the first side surface and a second electrode provided on the second side surface, and the first electrode and the second electrode are electrically connected via the first internal electrode. The second external electrode includes a third electrode provided on the first side surface and a fourth electrode provided on the second side surface, and the third electrode and the fourth electrode are electrically connected via the second internal electrode. The third external electrode includes a fifth electrode provided on the first side surface and a sixth electrode provided on the second side surface, and the fifth electrode and the sixth electrode are electrically connected via the third internal electrode. The fourth external electrode includes a seventh electrode provided on the first side surface and an eighth electrode provided on the second side surface, and the seventh electrode and the eighth electrode are electrically connected via the third internal electrode.

[0007] A multilayer varistor according to one aspect of the present disclosure comprises a sintered body, a first internal electrode, a second internal electrode, a third internal electrode, a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode. The sintered body has a first end face and a second end face facing each other in a first direction, a first side face and a second side face facing each other in a second direction, and a first main face and a second main face facing each other in a third direction. The sintered body is formed in a rectangular parallelepiped shape with long sides in the first direction, and has a laminated structure in which a plurality of layers are laminated along the third direction. The first internal electrode is provided on a first lamination surface within the sintered body. The second internal electrode is provided on a second lamination surface within the sintered body that is different from the first lamination surface. The third internal electrode is provided on a third lamination surface between the first lamination surface and the second lamination surface within the sintered body. The first external electrode is provided on at least one of the first side face and the second side face, and is electrically connected to the first internal electrode. The second external electrode is provided on at least one of the first side surface and the second side surface and is electrically connected to the second internal electrode. The third external electrode is provided on the first end surface and is electrically connected to the third internal electrode. The fourth external electrode is provided on the second end surface and is electrically connected to the third internal electrode. The third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction. The first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion. The second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion. The third internal electrode has a third opposing portion. In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion. In the first direction, the third external electrode, the first external electrode, the second external electrode, and the fourth external electrode are arranged in this order. A first distance between the first external electrode and the second external electrode is greater than at least one of a second distance between the third external electrode and the first external electrode and a third distance between the second external electrode and the fourth external electrode. Also, a multilayer varistor according to one aspect of the present disclosure comprises a sintered body, a first internal electrode, a second internal electrode, a third internal electrode, a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode. The sintered body has a first end face and a second end face facing each other in a first direction, a first side face and a second side face facing each other in a second direction, and a first main face and a second main face facing each other in a third direction. The sintered body is formed in a rectangular parallelepiped shape with long sides in the first direction, and has a laminated structure in which a plurality of layers are laminated along the third direction. The first internal electrode is provided on a first lamination surface inside the sintered body. The second internal electrode is provided on a second lamination surface inside the sintered body that is different from the first lamination surface. The third internal electrode is provided on a third lamination surface between the first lamination surface and the second lamination surface inside the sintered body. The first external electrode is provided on at least one of the first side face and the second side face, and is electrically connected to the first internal electrode. The second external electrode is provided on at least one of the first side surface and the second side surface and is electrically connected to the second internal electrode. The third external electrode and the fourth external electrode are provided on at least one of the first side surface and the second side surface and are electrically connected to the third internal electrode, respectively. The third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction. The first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion. The second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion. The third internal electrode has a third opposing portion. In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion. In the first direction, the third external electrode, the first external electrode, the second external electrode, and the fourth external electrode are arranged in this order. A first distance between the first external electrode and the second external electrode is greater than at least one of a second distance between the third external electrode and the first external electrode and a third distance between the second external electrode and the fourth external electrode. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a multilayer varistor according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective top view of the laminated varistor. [Figure 3] FIG. 3 is a cross-sectional view of the laminated varistor. [Figure 4] FIG. 4 is an external perspective view of the laminated varistor. [Figure 5]FIG. 5 is a plan view of the laminated varistor. [Figure 6] FIG. 6 is a perspective top view of the multilayer varistor according to the first modification of the present disclosure. [Figure 7] FIG. 7 is a cross-sectional view of the multilayer varistor of the first modification. [Figure 8] FIG. 8 is a perspective top view of another form of the multilayer varistor according to the first modification. [Figure 9] FIG. 9 is a perspective top view of the multilayer varistor of the second modification. [Figure 10] FIG. 10 is a perspective top view of another form of the multilayer varistor according to the second modification. [Figure 11] FIG. 11 is a cross-sectional view of the multilayer varistor of the third modification. [Figure 12] FIG. 12 is a cross-sectional view of another type of multilayer varistor according to the third modification. [Figure 13] FIG. 13 is a perspective top view of the multilayer varistor of the fourth modification. [Figure 14] FIG. 14 is a perspective top view of another form of the multilayer varistor according to the fourth modification. [Figure 15] FIG. 15 is a plan view of the multilayer varistor of the fifth modification. [Figure 16] FIG. 16 is an external perspective view of the laminated varistor of the sixth modification. [Figure 17] FIG. 17 is a perspective top view of a multilayer varistor according to the second embodiment of the present disclosure. [Figure 18] FIG. 18 is a plan view of the laminated varistor. [Figure 19] FIG. 19 is a perspective top view of the multilayer varistor according to another embodiment of the same. [Figure 20] FIG. 20 is a perspective top view of the multilayer varistor according to another embodiment of the same. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a multilayer varistor according to an embodiment of the present disclosure will be described with reference to the drawings.

[0010] (Embodiment 1) FIG. 1 is a see-through perspective view of a multilayer varistor 1 in one embodiment, FIG. 2 is a see-through view from above of the multilayer varistor 1, FIG. 3 is a cross-sectional view of the multilayer varistor 1, and FIG. 4 is an external perspective view of the multilayer varistor 1. The multilayer varistor 1 comprises a sintered body 11, a first internal electrode 13, a second internal electrode 17, a third internal electrode 21, a first external electrode 12, a second external electrode 16, a third external electrode 20, and a fourth external electrode 24. The sintered body 11 of this multilayer varistor 1 excluding the external electrodes has a rectangular parallelepiped shape, for example, with a length of 1.6 mm, a width of 0.8 mm, and a height of 0.6 mm. Note that the size of the sintered body 11 is an example and can be changed as appropriate. Furthermore, in the external perspective views such as FIG. 4, the outer shape of the sintered body 11 is shown as a rectangular parallelepiped, but the corners of the sintered body 11 may be appropriately chamfered or rounded.

[0011] In the following description, as shown in Fig. 1, the X-axis direction parallel to the long side direction of the sintered body 11 is defined as the left-right direction, the Y-axis direction as the front-rear direction (depth direction), and the Z-axis direction as the up-down direction. Furthermore, the positive direction of the X-axis direction is defined as the right side, the positive direction of the Y-axis direction as the front side, and the positive direction of the Z-axis direction as the top side. However, these directions are merely examples and are not intended to limit the directions in which the monolithic varistor 1 is used. Furthermore, the arrows indicating the various directions in the drawings are merely shown for the purpose of explanation and do not have any substance.

[0012] 2 and 3, the sintered body 11 has a first end face S11 and a second end face S12 facing each other in a first direction, a first side face S21 and a second side face S22 facing each other in a second direction, and a first main face S31 and a second main face S32 facing each other in a third direction. The sintered body 11 has a layered structure in which a plurality of layers LY11 to LY14 (see FIG. 3) are layered in the third direction, and is formed in the shape of a rectangular parallelepiped with its long sides extending in the first direction.

[0013] The sintered body 11 is composed of a semiconductor ceramic component having nonlinear resistance characteristics. The sintered body 11 is composed mainly of ZnO, and subcomponents include Bi2O3, Co2O3, MnO2, Sb2O3, or Pr6O 11, Co2O3, CaCO3, Cr2O3, etc. More preferably, the sintered body 11 contains, for example, ZnO as the main component and at least one of Bi2O3, Co2O3, MnO2, and Sb2O3, or Pr6O as the secondary component. 11 , Co2O3, CaCO3, and Cr2O3. The sintered body 11 is formed by sintering ZnO and precipitating other minor components at its grain boundaries, with internal electrodes formed between the layers. The grain boundary barriers formed between the ZnO particles result in nonlinear resistance characteristics. The sintered body 11 is formed, for example, by laminating four layers LY11 to LY14 (see FIG. 3) whose main component is ZnO and then sintering them.

[0014] A first external electrode 12 and a second external electrode 16 are provided on the long-side side surfaces of the sintered body 11. More specifically, the first external electrode 12 and the second external electrode 16 are provided side by side in the long-side direction (first direction) in the center of the long-side side surfaces (first side surface S21 and second side surface S22) of the sintered body 11. Furthermore, a third external electrode 20 and a fourth external electrode 24 are provided on the long-side side surfaces of the sintered body 11 closer to the short sides of the sintered body 11 than the first external electrode 12 and the second external electrode 16. In other words, the first external electrode 12 and the second external electrode 16 are provided between the third external electrode 20 and the fourth external electrode 24 in the first direction. More specifically, on the long-side side surfaces (first side surface S21 and second side surface S22) of the sintered body 11, the third external electrode 20 is provided between the first external electrode 12 and the first end surface S11, and the fourth external electrode 24 is provided between the second external electrode 16 and the second end surface S12. That is, the third external electrode 20, the first external electrode 12, the second external electrode 16, and the fourth external electrode 24 are arranged in this order in the first direction.

[0015] The first to fourth external electrodes 12, 16, 20, 24 are formed of a metal such as silver, copper, platinum, or an alloy thereof. The first to fourth external electrodes 12, 16, 20, 24 are formed, for example, by roller-transferring a conductive paste onto the surface of the sintered body 11. The first to fourth external electrodes 12, 16, 20, 24 may be composed of a primary electrode formed of a metal such as silver, copper, platinum, or an alloy thereof, and a secondary electrode made of a plating layer of nickel, tin, or the like formed on the surface of the primary electrode.

[0016] The first external electrode 12 is provided on at least one of the first side surface S21 and the second side surface S22, and is electrically connected to a first internal electrode 13 provided in an inner layer of the sintered body 11. In this embodiment, the first external electrode 12 is provided on both the first side surface S21 and the second side surface S22. That is, the first external electrode 12 includes a first electrode 51 provided on the first side surface S21 and a second electrode 52 provided on the second side surface S22, and the first electrode 51 and the second electrode 52 are electrically connected via the first internal electrode 13.

[0017] The second external electrode 16 is provided on at least one of the first side surface S21 and the second side surface S22, and is electrically connected to a second internal electrode 17 provided in an inner layer of the sintered body 11. In this embodiment, the second external electrode 16 is provided on both the first side surface S21 and the second side surface S22. That is, the second external electrode 16 includes a third electrode 53 provided on the first side surface S21 and a fourth electrode 54 provided on the second side surface S22, and the third electrode 53 and the fourth electrode 54 are electrically connected via the second internal electrode 17.

[0018] A third internal electrode 21 electrically connected to the third external electrode 20 and the fourth external electrode 24 is provided inside the sintered body 11. In other words, the third external electrode 20 and the fourth external electrode 24 are provided on at least one of the first side surface S21 and the second side surface S22, and are electrically connected to the third internal electrode 21 provided in the inner layer of the sintered body 11, respectively.

[0019] In this embodiment, the third external electrode 20 is provided on both the first side surface S21 and the second side surface S22. That is, the third external electrode 20 includes a fifth electrode 55 provided on the first side surface S21 and a sixth electrode 56 provided on the second side surface S22, and the fifth electrode 55 and the sixth electrode 56 are electrically connected via the third internal electrode 21.

[0020] In this embodiment, the fourth external electrode 24 is provided on both the first side surface S21 and the second side surface S22. That is, the fourth external electrode 24 includes a seventh electrode 57 provided on the first side surface S21 and an eighth electrode 58 provided on the second side surface S22, and the seventh electrode 57 and the eighth electrode 58 are electrically connected via the third internal electrode 21.

[0021] In this embodiment, the sintered body 11 is formed by stacking, for example, four layers LY11 to LY14 in a third direction (see FIG. 3). The first internal electrode 13 is provided, for example, on the upper surface of the third layer LY13 from the bottom among the four layers LY11 to LY14 (hereinafter also referred to as the first stacking surface SF1) by a method such as printing. The second internal electrode 17 is provided, for example, on the upper surface of the bottommost layer LY11 (hereinafter also referred to as the second stacking surface SF2) by a method such as printing. The third internal electrode 21 is provided, for example, on the upper surface of the second layer LY12 from the bottom (hereinafter also referred to as the third stacking surface SF3) by a method such as printing. In other words, the first internal electrode 13 is provided on the first stacking surface SF1 inside the sintered body 11. The second internal electrode 17 is provided, for example, on the second stacking surface SF2 different from the first stacking surface SF1 inside the sintered body 11. The third internal electrode 21 is provided on a third stacking surface SF3 between the first stacking surface SF1 and the second stacking surface SF2 inside the sintered body 11. That is, in the third direction (vertical direction), the third internal electrode 21 is disposed between the first internal electrode 13 and the second internal electrode 17. The first to third internal electrodes 13, 17, 21 are formed of a metal such as silver, copper, gold, platinum, or an alloy thereof.

[0022] The first internal electrode 13 has a first opposing portion 14 and a first lead portion 15 that is narrower than the first opposing portion 14. In the first direction (left-right direction), the first lead portion 15 is narrower than the first opposing portion 14. The first lead portion 15 protrudes from the first opposing portion 14 along the second direction (front-rear direction). In this embodiment, two first lead portions 15 protrude from the first opposing portion 14 toward the front and rear. One of the two first lead portions 15 is electrically connected to the first external electrode 12 (first electrode 51) provided on the first side surface S21, and the other of the two first lead portions 15 is electrically connected to the first external electrode 12 (second electrode 52) provided on the second side surface S22.

[0023] The second internal electrode 17 has a second opposing portion 18 and a second lead portion 19 that is narrower than the second opposing portion 18. In the first direction (left-right direction), the second lead portion 19 is narrower than the second opposing portion 18. The second lead portion 19 protrudes from the second opposing portion 18 along the second direction (front-rear direction). In this embodiment, two second lead portions 19 protrude from the second opposing portion 18 toward the front and rear. One of the two second lead portions 19 is electrically connected to the second external electrode 16 (third electrode 53) provided on the first side surface S21, and the other of the two second lead portions 19 is electrically connected to the second external electrode 16 (fourth electrode 54) provided on the second side surface S22.

[0024] The third internal electrode 21 has a third opposing portion 22, a third lead portion 23, and a fourth lead portion 27. The third lead portion 23 includes a first connecting portion 231 and a first protruding portion 232. The first connecting portion 231 connects two third external electrodes 20 (i.e., the fifth electrode 55 and the sixth electrode 56). The first protruding portion 232 is narrower in width than the third opposing portion 22 in the second direction, protrudes from the third opposing portion 22 along the first direction, and is connected to the first connecting portion 231. The fourth lead portion 27 includes a second connecting portion 271 and a second protruding portion 272. The second connecting portion 271 connects two fourth external electrodes 24 (i.e., the seventh electrode 57 and the eighth electrode 58). The second protruding portion 272 is narrower in the second direction than the third opposing portion 22, and protrudes from the third opposing portion 22 along the first direction to be connected to the second connecting portion 271. In other words, the third internal electrode 21 has the third opposing portion 22, a third lead portion 23 connected to the third external electrode 20 and narrower in width than the third opposing portion 22, and a fourth lead portion 27 connected to the fourth external electrode 24 and narrower in width than the third opposing portion 22.

[0025] Here, in the second direction, the width of the first protruding portion 232 protruding from the third opposing portion 22 in the first direction is preferably 90% or less of the width of the third opposing portion 22. Furthermore, in the second direction, the width of the second protruding portion 272 protruding from the third opposing portion 22 in the first direction is preferably 90% or less of the width of the third opposing portion 22. Furthermore, by making the widths of the first protruding portion 232 and the second protruding portion 272 each 90% or less of the width of the third opposing portion 22 in the second direction, the occurrence of crosstalk can be suppressed.

[0026] The first external electrode 12 is connected to the first opposing portion 14 by a first lead portion 15. The second external electrode 16 is connected to the second opposing portion 18 by a second lead portion 19. The third external electrode 20 is connected to the third opposing portion 22 by a third lead portion 23. The fourth external electrode 24 is connected to the third opposing portion 22 by a fourth lead portion 27.

[0027] The third internal electrode 21 is provided so as to be sandwiched between the first internal electrode 13 and the second internal electrode 17 in the lamination direction of the sintered body 11, and the third opposing portion 22 and the first opposing portion 14, and the third opposing portion 22 and the second opposing portion 18, respectively, form a varistor region. In other words, the multilayer varistor 1 has two varistors (a first varistor 1A and a second varistor 1B). The first varistor 1A is configured between the first external electrode 12 and the third external electrode 20 and the fourth external electrode 24, that is, between the first internal electrode 13 and the third internal electrode 21. The second varistor 1B is configured between the second external electrode 16 and the fourth external electrode 24, that is, between the second internal electrode 17 and the third internal electrode 21.

[0028] The third opposing portion 22 is a rectangle of, for example, 0.46 mm x 0.2 mm, and the first opposing portion 14 and the second opposing portion 18 are each a rectangle of, for example, 0.4 mm x 0.14 mm. The third opposing portion 22 and the first opposing portion 14 are opposed to each other at an interval of, for example, 0.035 mm in the stacking direction of the sintered body 11. Similarly, the third opposing portion 22 and the second opposing portion 18 are opposed to each other at an interval of, for example, 0.035 mm in the stacking direction of the sintered body 11. Note that these dimensions are merely examples and can be changed as appropriate.

[0029] Here, the centers of the first opposing portion 14, the second opposing portion 18, and the third opposing portion 22 are located at the same position when viewed from the stacking direction. In other words, the third internal electrode 21 has a first overlapping region A1 that overlaps with at least a portion of the first internal electrode 13 in the third direction, and a second overlapping region A2 that overlaps with at least a portion of the second internal electrode 17 in the third direction. The first overlapping region A1 includes at least a region of the third internal electrode 21 that faces the first opposing portion 14 of the first internal electrode 13 (the region hatched in FIG. 2). The second overlapping region A2 includes at least a region of the third internal electrode 21 that faces the second opposing portion 18 of the second internal electrode 17. The first opposing portion 14 and the second opposing portion 18 are located at the same position in the third direction. Therefore, in the third internal electrode 21, the first overlapping region A1 and the second overlapping region A2 at least partially overlap. Specifically, the first overlapping region A1 and the second overlapping region A2 overlap in the region where the first facing portion 14 and the second facing portion 18 overlap.

[0030] Furthermore, when viewed from the stacking direction, the third opposing portion 22 protrudes, for example, 0.03 mm beyond the first opposing portion 14 and the second opposing portion 18, and covers the entire periphery of the first opposing portion 14 and the second opposing portion 18. This prevents stray capacitance from occurring between the first opposing portion 14 and the second opposing portion 18, and suppresses crosstalk. Note that the amount by which the third opposing portion 22 protrudes beyond the first opposing portion 14 and the second opposing portion 18 is not limited to 0.03 mm and can be changed as appropriate.

[0031] Furthermore, since the third opposing portions 22 are provided so as to cover the entire peripheries of the first opposing portions 14 and the second opposing portions 18, the length of the third opposing portions 22 in the first direction is longer than the length of the first opposing portions 14, and the length of the third opposing portions 22 is longer than the length of the second opposing portions 18. As a result, even if the relative position of the third opposing portions 22 with respect to the first opposing portions 14 and the second opposing portions 18 in the first direction is slightly shifted, the third opposing portions 22 are more likely to face the entire first opposing portions 14 and the entire second opposing portions 18, respectively, and changes in capacitance can be suppressed.

[0032] Furthermore, in the second direction, the length of the third opposing portion 22 is longer than the length of the first opposing portion 14, and the length of the third opposing portion 22 is longer than the length of the second opposing portion 18. As a result, even if the relative position of the third opposing portion 22 with respect to the first opposing portion 14 and the second opposing portion 18 in the second direction is slightly shifted, the third opposing portion 22 is more likely to face the entire first opposing portion 14 and the entire second opposing portion 18, respectively, and changes in capacitance can be suppressed.

[0033] In the present embodiment, the length of the third opposing portion 22 is longer than the length of the first opposing portion 14 and longer than the length of the second opposing portion 18 in each of the first and second directions, but this is not limiting. The length of the third opposing portion 22 may be longer than the length of the first opposing portion 14 and longer than the length of the second opposing portion 18 in either the first direction or the second direction.

[0034] Furthermore, the area of ​​the third opposing portion 22 is larger than the area of ​​the first opposing portion 14, and the area of ​​the third opposing portion 22 is larger than the area of ​​the second opposing portion 18. This makes it possible to reduce crosstalk and also to prevent the difference in capacitance between the first varistor 1A and the second varistor 1B from increasing due to manufacturing errors or the like.

[0035] A first lead portion 15 having a width of, for example, 0.1 mm extends from the first opposing portion 14 and is connected to the first external electrode 12 on both side surfaces (first side surface S21 and second side surface S22) that form the long sides. Similarly, a second lead portion 19 having a width of, for example, 0.1 mm extends from the second opposing portion 18 and is connected to the second external electrode 16 on both side surfaces (first side surface S21 and second side surface S22) that form the long sides. A third lead portion 23 having a width of, for example, 0.1 mm extends from the third opposing portion 22 and is connected to the third external electrode 20, and a fourth lead portion 27 having a width of, for example, 0.1 mm extends and is connected to the fourth external electrode 24. Since the external electrodes are connected by lead portions that are narrower than the opposing portions in this way, the stray capacitance between the first external electrode 12 and the second external electrode 16 can be reduced, thereby minimizing the effect on crosstalk.

[0036] The width of the first lead portion 15 and the second lead portion 19 is preferably, for example, 0.08 mm or more and 90% or less of the width of the first opposing portion 14 and the second opposing portion 18. In other words, the width of the first lead portion 15 in the first direction is preferably 90% or less of the width of the first opposing portion 14. Furthermore, the width of the second lead portion 19 in the first direction is preferably 90% or less of the width of the second opposing portion 18. If the widths of the first lead portion 15 and the second lead portion 19 are smaller than 0.08 mm, the shapes of the first lead portion 15 and the second lead portion 19 are likely to become unstable, and the connection with the external electrodes is likely to become unstable. Conversely, if the width of the first lead portion 15 is larger than 90% of the width of the first opposing portion 14 or the width of the second lead portion 19 is larger than 90% of the width of the second opposing portion 18, this is undesirable because it increases stray capacitance that affects crosstalk.

[0037] Furthermore, when viewed from above, the extent to which the third opposing portions 22 protrude (protrusion amount) from the outer peripheries of the first opposing portions 14 and the second opposing portions 18 in the first direction is preferably 7.5% or more and 15% or less of the long sides of the first opposing portions 14 and the second opposing portions 18. Here, the protrusion amount of the third opposing portions 22 in the first direction is the sum of the amount by which the third opposing portions 22 protrude to the right from the outer peripheries of the first opposing portions 14 and the second opposing portions 18 and the amount by which the third opposing portions 22 protrude to the left from the outer peripheries of the first opposing portions 14 and the second opposing portions 18. In other words, the length of the third opposing portions 22 in the first direction is preferably 107.5% or more and 115% or less of the length of the first opposing portions 14 and the second opposing portions 18. This is because crosstalk increases sharply if the protrusion amount of the third opposing portion 22 in the first direction is less than 7.5% of the dimensions of the first opposing portion 14 and the second opposing portion 18, and if it is more than 15%, manufacturing misalignment cannot be alleviated and the difference in capacitance between the left and right becomes large. Note that the protrusion amount of the third opposing portion 22 in the first direction is more preferably 9% to 13.5% of the length of the first opposing portion 14 or the second opposing portion 18, which can further reduce crosstalk and alleviate manufacturing misalignment.

[0038] Furthermore, when viewed from above, it is desirable that the extent to which the third opposing portions 22 protrude (protrusion amount) from the outer peripheries of the first opposing portions 14 and the second opposing portions 18 in the second direction is 7.5% or more and 15% or less of the short sides of the first opposing portions 14 and the second opposing portions 18. Here, the protrusion amount of the third opposing portions 22 in the second direction is the sum of the amount by which the third opposing portions 22 protrude forward from the outer peripheries of the first opposing portions 14 and the second opposing portions 18 and the amount by which the third opposing portions 22 protrude rearward from the outer peripheries of the first opposing portions 14 and the second opposing portions 18. In other words, the length of the third opposing portions 22 in the second direction is 107.5% or more of the length of the first opposing portions 14 and the second opposing portions 18, and 115% It is preferable that the protrusion amount of the third opposing portion 22 in the second direction is 9% or more and 13.5% or less of the length of the second opposing portion 18 or the third opposing portion 22. This is because if the protrusion amount of the third opposing portion 22 in the second direction is less than 7.5% of the dimensions of the first opposing portion 14 and the second opposing portion 18, crosstalk will increase sharply, and if it is more than 15%, manufacturing deviations cannot be alleviated and the difference in capacitance between the left and right sides will increase. It is more preferable that the protrusion amount of the third opposing portion 22 in the second direction is 9% or more and 13.5% or less of the length of the second opposing portion 18 or the third opposing portion 22, which will further reduce crosstalk and alleviate manufacturing deviations.

[0039] The multilayer varistor 1 configured as described above is placed on a balanced line extending in parallel, and the first external electrode 12 and the second external electrode 16 are connected, while the third external electrode 20 and the fourth external electrode 24 are grounded, thereby enabling connection without bending the path of the signal line of the balanced line. When static electricity is superimposed on the signal line of the balanced line and a voltage exceeding a predetermined threshold voltage is applied to the multilayer varistor 1 (first varistor 1A or second varistor 1B), the electrical resistance of the multilayer varistor 1 drops sharply and current flows through the multilayer varistor 1, thereby protecting the circuit in which the multilayer varistor 1 is provided.

[0040] Furthermore, in the multilayer varistor 1 of this embodiment, the first to fourth external electrodes 12, 16, 20, 24 are formed on the surface of the sintered body 11, for example, by roller transfer of a conductive paste. The first to fourth external electrodes 12, 16, 20, 24 provided on the first side surface S21 are provided from the first side surface S21 to parts of the first main surface S31 and the second main surface S32, respectively. Furthermore, the first to fourth external electrodes 12, 16, 20, 24 provided on the second side surface S22 are provided from the second side surface S22 to parts of the first main surface S31 and the second main surface S32, respectively.

[0041] 5, in the multilayer varistor 1 of this embodiment, the first opposing portions 14 are arranged at positions where they do not overlap with the second external electrodes 16 in the third direction, making it possible to prevent crosstalk from occurring between the first external electrodes 12 and the second external electrodes 16. It is preferable to make the size of the first opposing portions 14 when viewed from the third direction (size in top view) as large as possible within the range where the first opposing portions 14 and the second external electrodes 16 do not overlap in the third direction, making it possible to increase the current that can be passed through the multilayer varistor 1 (first varistor 1A).

[0042] 5, in the multilayer varistor 1 of this embodiment, the second opposing portions 18 are arranged at positions that do not overlap the first external electrodes 12 in the third direction, making it possible to suppress the occurrence of crosstalk between the first external electrodes 12 and the second external electrodes 16. Note that it is preferable to make the size of the second opposing portions 18 when viewed from the third direction (size in top view) as large as possible within the range where the second opposing portions 18 and the first external electrodes 12 do not overlap in the third direction, making it possible to increase the current that can be passed through the multilayer varistor 1 (second varistor 1B).

[0043] Furthermore, the multilayer varistor 1 of this embodiment comprises a first varistor 1A and a second varistor 1B, and the capacitance of each of the first varistor 1A and the second varistor 1B is preferably 200 pF or less. Furthermore, the difference between the capacitance of the first varistor 1A and the capacitance of the second varistor 1B is preferably not less than -20% and not more than +20% of the capacitance of the first varistor 1A. This makes it possible to suppress crosstalk and improve communication quality when the multilayer varistor 1 is connected to a communication IC or the like.

[0044] (Modification of the first embodiment) The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above embodiment are listed below. The modifications described below can be applied in appropriate combination. Furthermore, the modifications described below can be applied in appropriate combination with the multilayer varistor 1 of embodiment 2 described later.

[0045] (Variation 1) FIG. 6 is a perspective top view of the multilayer varistor 1 in Modification 1 of Embodiment 1, and FIG. 7 is a cross-sectional view of the multilayer varistor 1 in Modification 1. As shown in FIG.

[0046] In the multilayer varistor 1 of Modification 1, the first opposing portions 14 and the second opposing portions 18 are configured so as not to overlap when viewed from above. In the first direction, the lengths of the first opposing portions 14 and the second opposing portions 18 are set to dimensions smaller than half the length of the third opposing portions 22. In the second direction, the length of the third opposing portions 22 is 107.5% to 115% of the lengths of the first opposing portions 14 and the second opposing portions 18. In top view, the first opposing portions 14 and the second opposing portions 18 are arranged so as to align in the first direction without overlapping each other. This can further reduce crosstalk. Note that the configuration other than the first internal electrode 13 and the second internal electrode 17 is the same as that of the multilayer varistor 1 of the above embodiment, so common components are denoted by the same reference numerals and their description will be omitted.

[0047] In the multilayer varistor 1 of Modification 1 shown in Fig. 6, the first external electrode 12 and the second external electrode 16 are provided on the first side face S21 side and the second side face S22 side, respectively. The first lead portion 15 extends to the first side face S21 side and the second side face S22 side, respectively, and is electrically connected to the two first external electrodes 12, respectively. Similarly, the second lead portion 19 extends to the first side face S21 side and the second side face S22 side, respectively, and is electrically connected to the two second external electrodes 16, respectively.

[0048] The third internal electrode 21 has a first overlapping region A1 that overlaps with at least a portion of the first internal electrode 13 in the third direction, and a second overlapping region A2 that overlaps with at least a portion of the second internal electrode 17 in the third direction. In FIG. 6, the first overlapping region A1 and the second overlapping region A2 are each represented by dot hatching. Since the first opposing portion 14 and the second opposing portion 18 are configured not to overlap in the third direction, the third internal electrode 21 does not overlap with the second opposing portion 18 in the first overlapping region A1, but overlaps with the first opposing portion 14. Furthermore, the third internal electrode 21 does not overlap with the first opposing portion 14 in the second overlapping region A2, but overlaps with the second opposing portion 18. Therefore, in the third internal electrode 21, the first overlapping region A1 and the second overlapping region A2 are provided in different regions.

[0049] By doing so, even if the relative positions of the internal electrodes change, the difference in capacitance between the two varistors (the first varistor 1A and the second varistor 1B) can be reduced. Alternatively, the first external electrode 12 and the second external electrode 16 can be provided on the first side face S21 side and the second side face S22 side, the first lead portion 15 can be provided only on the first side face S21 side, and the second lead portion 19 can be provided only on the second side face S22 side, and they can be electrically connected to each other. In other words, the first external electrode 12 provided on the second side face S22 side is not electrically connected to the first opposing portion 14, and the second external electrode 16 provided on the first side face S21 side is not electrically connected to the second opposing portion 18. By doing so, soldering is performed on each external electrode, making it possible to further reduce crosstalk while ensuring mountability.

[0050] Fig. 8 is a perspective top view of another form of the multilayer varistor 1 of Modification 1. In the multilayer varistor 1 shown in Fig. 8, a part of the left side of the third opposing portion 22 of the third internal electrode 21 is the first overlapping region A1, and a part of the right side of the third opposing portion 22 is the second overlapping region A2. In the third opposing portion 22, a groove 221 opening to the front side and a groove 222 opening to the rear side are provided in the region between the first overlapping region A1 and the second overlapping region A2.

[0051] In this way, by forming grooves 221, 222 in the third opposing portion 22, the capacitance formed between the first internal electrode 13 (first external electrode 12) and the second internal electrode 17 (second external electrode 16) can be further reduced, and crosstalk can also be reduced.

[0052] (Variation 2) In the above embodiment and variant 1, the first to fourth external electrodes 12, 16, 20, 24 are provided on the first side surface S21 and the second side surface S22 of the sintered body 11, respectively, but it is sufficient that they are provided on at least one of the first side surface S21 and the second side surface S22.

[0053] 9 is a perspective top view of the multilayer varistor 1 in Modification 2 of Embodiment 1. In the multilayer varistor 1 of Modification 2, the first external electrode 12 is provided only on the second side face S22 side, and the second external electrode 16 is provided only on the first side face S21 side. Furthermore, the first lead portion 15 is provided only on the second side face S22 side, and is electrically connected to the first external electrode 12 provided on the second side face S22. The second lead portion 19 is provided only on the first side face S21 side, and is electrically connected to the second external electrode 16 provided on the first side face S21. Note that the configuration other than the first external electrode 12, the second external electrode 16, the first internal electrode 13, and the second internal electrode 17 is the same as that of the multilayer varistor 1 shown in FIGS. 6 and 7 described in Modification 1, and therefore the same reference numerals are used to designate the same components, and their description will be omitted.

[0054] In the multilayer varistor 1 of Modification 2, the first external electrode 12 is provided only on the second side surface S22, and the second external electrode 16 is provided only on the first side surface S21. Therefore, in the multilayer varistor 1 of Modification 2, the distance between the first lead portion 15 and the second lead portion 19 is longer than when the first external electrode 12 and the second external electrode 16 are arranged side by side on the first side surface S21 and the second side surface S22. This results in almost no stray capacitance occurring between the lead portions (between the first lead portion 15 and the second lead portion 19), making it possible to further reduce crosstalk.

[0055] In the multilayer varistor 1 shown in Fig. 9, the first opposing portions 14 and the second opposing portions 18 are arranged so as to be aligned in the first direction without overlapping each other when viewed from above, but the first opposing portions 14 and the second opposing portions 18 may also be arranged so as to be aligned in the second direction without overlapping each other, as shown in Fig. 10. Specifically, the first opposing portions 14 and the second opposing portions 18 are aligned in the second direction so that the first opposing portions 14 are located on the rear side and the second opposing portions 18 are located on the front side when viewed from above.

[0056] In the second direction, the lengths of the first opposing portions 14 and the second opposing portions 18 are set to dimensions that are smaller than half the length of the third opposing portions 22. In addition, in the first direction, the length of the third opposing portions 22 is 107.5% to 115% of the lengths of the first opposing portions 14 and the second opposing portions 18. When viewed from above (when viewed from the third direction), the first opposing portions 14 and the second opposing portions 18 are arranged side by side in the second direction without overlapping each other.

[0057] The first external electrode 12 is disposed on the second side surface S22, midway between the third external electrode 20 and the fourth external electrode 24. The first opposing portion 14 is electrically connected to the first external electrode 12 via a first lead portion 15 that protrudes rearward from the first opposing portion 14.

[0058] The second external electrode 16 is disposed on the first side surface S21, midway between the third external electrode 20 and the fourth external electrode 24. The second opposing portion 18 is electrically connected to the second external electrode 16 via a second lead portion 19 that protrudes forward from the second opposing portion 18.

[0059] 10, the first external electrode 12 is disposed midway between the third external electrode 20 and the fourth external electrode 24 on the second side surface S22, and the second external electrode 16 is disposed midway between the third external electrode 20 and the fourth external electrode 24 on the first side surface S21. This makes it possible to increase the distance between the first external electrode 12 and the third external electrode 20 and the fourth external electrode 24, and the distance between the second external electrode 16 and the third external electrode 20 and the fourth external electrode 24, as well as the distance between the second external electrode 16 and the third external electrode 20 and the fourth external electrode 24, compared to the multilayer varistor shown in Fig. 9. This reduces stray capacitance and suppresses the occurrence of crosstalk.

[0060] (Variation 3) Fig. 11 is a cross-sectional view of the multilayer varistor 1 in Modification 3 of Embodiment 1. The multilayer varistor 1 shown in Fig. 11 differs from the above-described embodiment in that it further comprises third internal electrodes 21A, 21B. Note that the configuration other than the third internal electrodes 21A, 21B is the same as in Embodiment 1 above, and therefore the same components are denoted by the same reference numerals and their description will be omitted.

[0061] The third internal electrodes 21A, 21B are formed in the same shape as the third internal electrode 21 when viewed from above, and are arranged at positions overlapping the third internal electrode 21 when viewed from above. The third internal electrodes 21A, 21B are electrically connected to the third external electrode 20 and the fourth external electrode 24. That is, the third internal electrodes 21A, 21B are electrically connected to the third internal electrode 21 via the third external electrode 20 and the fourth external electrode 24. Inside the sintered body 11, the third internal electrode 21A is arranged above the first internal electrode 13, and the third internal electrode 21B is arranged below the second internal electrode 17. Here, a first varistor 1A is formed between the first internal electrode 13 and the third internal electrodes 21, 21A, and a second varistor 1B is formed between the second internal electrode 17 and the third internal electrodes 21, 21B. This makes it possible to increase the value of the current that can flow through each of the first varistor 1A and the second varistor 1B.

[0062] 12 is a cross-sectional view of another form of the multilayer varistor 1 of Modification 3. The multilayer varistor 1 shown in Fig. 12 comprises a plurality of first internal electrodes 13 and a plurality of second internal electrodes 17. A third internal electrode 21A electrically connected to the third internal electrode 21 is arranged between the plurality of first internal electrodes 13, and a third internal electrode 21B electrically connected to the third internal electrode 21 is arranged between the plurality of second internal electrodes 17. Note that this is the same as the above-mentioned embodiment 1 except for the points that a plurality of first internal electrodes 13 and a plurality of second internal electrodes 17 are provided, and that the third internal electrodes 21A and 21B are provided, and therefore common components are denoted by the same reference numerals and description thereof will be omitted.

[0063] The first internal electrodes 13 are formed to have the same shape when viewed from above, and are arranged in positions where they overlap each other when viewed from above. The first internal electrodes 13 are electrically connected to the first external electrode 12, and the first internal electrodes 13 are electrically connected via the first external electrode 12.

[0064] The second internal electrodes 17 are formed to have the same shape when viewed from above, and are arranged at positions where they overlap each other when viewed from above. The second internal electrodes 17 are electrically connected to the second external electrode 16, and the second internal electrodes 17 are electrically connected via the second external electrode 16.

[0065] The third internal electrode 21 is disposed between the first internal electrode 13 and the second internal electrode 17. The third internal electrodes 21A and 21B are formed in the same shape as the third internal electrode 21 when viewed from above, and are disposed at positions overlapping the third internal electrode 21 when viewed from above. The third internal electrodes 21A and 21B are electrically connected to the third external electrode 20 and the fourth external electrode 24. That is, the third internal electrodes 21A and 21B are electrically connected to the third internal electrode 21 via the third external electrode 20 and the fourth external electrode 24. Inside the sintered body 11, the third internal electrode 21A is disposed between two first internal electrodes 13, and the third internal electrode 21B is disposed between two second internal electrodes 17.

[0066] 12 includes two first internal electrodes 13 and two second internal electrodes 17, with a first varistor 1A being formed between the two first internal electrodes 13 and the third internal electrodes 21, 21A, and a second varistor 1B being formed between the two second internal electrodes 17 and the third internal electrodes 21, 21B. This makes it possible to increase the value of the current that can be passed through each of the first varistor 1A and the second varistor 1B.

[0067] In the multilayer varistor 1 shown in FIG. 12, the number of first internal electrodes 13 and second internal electrodes 17 is two, but the number of each of the first internal electrodes 13 and second internal electrodes 17 may be three or more.

[0068] In the above-described embodiment and each modified example, a plurality of third internal electrodes 21 may be disposed between the first internal electrode 13 and the second internal electrode 17, which can further suppress the occurrence of crosstalk.

[0069] (Variation 4) In the above embodiment, the third opposing portion 22 covers the entire periphery of the first opposing portion 14 and the second opposing portion 18, but it is sufficient that the length of the third opposing portion 22 is longer than the lengths of the first opposing portion 14 and the second opposing portion 18 in either the first direction or the second direction. The multilayer varistor 1 of Modification 4 will be described with reference to Figures 13 and 14. Note that, apart from the sizes of the first opposing portion 14, the second opposing portion 18, and the third opposing portion 22, the multilayer varistor 1 is the same as in the above embodiment, and therefore the same reference numerals are used to designate the common components, and their description will be omitted.

[0070] Fig. 13 is a top perspective view of the multilayer varistor 1 in Modification 4. In the multilayer varistor 1 shown in Fig. 13, the length of the third opposing portion 22 in the first direction is shorter than the lengths of the first opposing portion 14 and the second opposing portion 18, but in the second direction the length of the third opposing portion 22 is longer than the lengths of the first opposing portion 14 and the second opposing portion 18. In this multilayer varistor 1, the occurrence of crosstalk can be suppressed and the difference in capacitance between the first varistor 1A and the second varistor 1B due to manufacturing deviations can be reduced compared to when the length of the third opposing portion 22 is shorter than the lengths of the first opposing portion 14 and the second opposing portion 18 in both the first and second directions.

[0071] 14 is a top perspective view of another form of the multilayer varistor 1 in Modification 4. In the multilayer varistor 1 shown in Fig. 14, the length of the third opposing portion 22 in the second direction is shorter than the lengths of the first opposing portion 14 and the second opposing portion 18, but the length of the third opposing portion 22 in the first direction is longer than the lengths of the first opposing portion 14 and the second opposing portion 18. In this multilayer varistor 1, the occurrence of crosstalk can be suppressed and the difference in capacitance between the first varistor 1A and the second varistor 1B due to manufacturing deviations can be reduced compared to when the length of the third opposing portion 22 is shorter than the lengths of the first opposing portion 14 and the second opposing portion 18 in both the first and second directions.

[0072] (Variation 5) 15 is a plan view of the multilayer varistor 1 in Modification 5 of Embodiment 1. In the multilayer varistor 1 of Modification 5, the first distance L1 between the first external electrode 12 and the second external electrode 16 is greater than the second distance L2 between the first external electrode 12 and the third external electrode 20 and the third distance L3 between the second external electrode 16 and the fourth external electrode 24. Note that, apart from the arrangement of the first to fourth external electrodes 12, 16, 20, 24, the multilayer varistor 1 is the same as in the above-described Embodiment 1, and therefore common components are denoted by the same reference numerals and their description will be omitted.

[0073] On the first side surface S21 and the second side surface S22, the first to fourth external electrodes 12, 16, 20, 24 are arranged so that the first distance L1 is greater than the second distance L2 and the third distance L3, respectively, so that the first distance L1 can be made greater than when the first to fourth external electrodes 12, 16, 20, 24 are arranged at equal intervals. This reduces the stray capacitance between the first external electrode 12 and the second external electrode 16, and suppresses the occurrence of crosstalk.

[0074] The first distance L1 between the first external electrode 12 and the second external electrode 16 only needs to be greater than at least one of the second distance L2 between the first external electrode 12 and the third external electrode 20 and the third distance L3 between the second external electrode 16 and the fourth external electrode 24, thereby suppressing the occurrence of crosstalk.

[0075] (Variation 6) 16 is an external perspective view of the laminated varistor 1 in Modification 6 of Embodiment 1. In the laminated varistor 1 of Modification 6, the third external electrode 20A and the fourth external electrode 24A are formed by dipping a conductive paste into the first end face S11 and the second end face S12 of the sintered body 11. Therefore, the third external electrode 20A is provided from the first end face S11 to the left end portions of the first side face S21, the second side face S22, the first main face S31, and the second main face S32. Furthermore, the fourth external electrode 24A is provided from the second end face S12 to the right end portions of the first side face S21, the second side face S22, the first main face S31, and the second main face S32.

[0076] In this case, the first connecting portion 231 of the third lead portion 23 can be omitted. That is, the third lead portion 23 of the third internal electrode 21 may be formed only by the first protruding portion 232 that protrudes leftward from the third opposing portion 22 along the first direction and is connected to the third external electrode 20A. The third opposing portion 22 of the third internal electrode 21 and the third external electrode 20A may be connected via the first protruding portion 232.

[0077] Similarly, the second connecting portion 271 of the fourth lead portion 27 may be omitted. That is, the fourth lead portion 27 of the third internal electrode 21 may be formed only with the second protruding portion 272 that protrudes rightward from the third opposing portion 22 along the first direction and is connected to the fourth external electrode 24A. The third opposing portion 22 of the third internal electrode 21 and the fourth external electrode 24A may be connected via the second protruding portion 272.

[0078] The configuration other than the third external electrode 20A, the fourth external electrode 24A, and the third internal electrode 21 is the same as in the above embodiment, so the same reference numerals are used for the common components and the description thereof will be omitted.

[0079] (Embodiment 2) FIG. 17 shows the structure of the multilayer varistor 1 according to the second embodiment. Perspective top view 18 is a plan view of the multilayer varistor 1. In the multilayer varistor 1 of embodiment 2, a third external electrode 20B is provided on the first end face S11 and is electrically connected to the third internal electrode 21. A fourth external electrode 24B is provided on the second end face S12 and is electrically connected to the third internal electrode 21. Note that the configuration other than the third external electrode 20B and the fourth external electrode 24B is the same as in embodiment 1, and therefore the same reference numerals are used to designate common components, and their description will be omitted.

[0080] The third external electrode 20B is formed on the center of the first end surface S11 in the second direction by, for example, transferring a conductive paste with a roller.

[0081] The fourth external electrode 24B is formed on the center of the second end surface S12 in the second direction by, for example, transferring a conductive paste with a roller.

[0082] The third internal electrode 21 has a third opposing portion 22, a third lead portion 23, and a fourth lead portion 27. The third lead portion 23 protrudes, for example, leftward from the third opposing portion 22 along the first direction and is connected to the third external electrode 20B. The fourth lead portion 27 protrudes, for example, rightward from the third opposing portion 22 along the first direction and is connected to the fourth external electrode 24B. In other words, the third external electrode 20B is connected to the third opposing portion 22 via the third lead portion 23, and the fourth external electrode 24B is connected to the third opposing portion 22 via the fourth lead portion 27. The third external electrode 20B and the fourth external electrode 24B are connected via the third internal electrode 21.

[0083] In the multilayer varistor 1 of this embodiment, the first external electrode 12 and the second external electrode 16 are provided between the third external electrode 20B and the fourth external electrode 24B in the first direction. More specifically, the third external electrode 20B, the first external electrode 12, the second external electrode 16, and the fourth external electrode 24B are arranged in this order in the first direction.

[0084] The first external electrode 12 and the second external electrode 16 provided on the first side surface S21 are provided from the first side surface S21 to parts of the first main surface S31 and the second main surface S32, respectively. The first external electrode 12 and the second external electrode 16 provided on the second side surface S22 are provided from the second side surface S22 to parts of the first main surface S31 and the second main surface S32, respectively. The third external electrode 20B provided on the first end surface S11 is provided from the first end surface S11 to parts of the first main surface S31 and the second main surface S32, and the fourth external electrode 24B provided on the second end surface S12 is provided from the second end surface S12 to parts of the first main surface S31 and the second main surface S32.

[0085] 18, the first opposing portions 14 are arranged at positions where they do not overlap with the second external electrodes 16 in the third direction, making it possible to prevent crosstalk from occurring between the first external electrodes 12 and the second external electrodes 16. It is preferable to make the size of the first opposing portions 14 as viewed from the third direction (top view) as large as possible within the range where the first opposing portions 14 and the second external electrodes 16 do not overlap in the third direction, thereby making it possible to increase the current that can be passed through the multilayer varistor 1 (first varistor 1A).

[0086] 18, the second opposing portions 18 are arranged at positions that do not overlap the first external electrode 12 in the third direction, making it possible to prevent crosstalk from occurring between the first external electrode 12 and the second external electrode 16. It is preferable to make the size of the second opposing portions 18 as viewed from the third direction (top view) as large as possible within the range in which the second opposing portions 18 and the first external electrode 12 do not overlap in the third direction, thereby making it possible to increase the current that can be passed through the multilayer varistor 1 (second varistor 1B).

[0087] In this embodiment, too, the first to fourth external electrodes 12, 16, 20B, 24B are preferably arranged so that the first distance between the first external electrode 12 and the second external electrode 16 is greater than at least one of the second distance between the first external electrode 12 and the third external electrode 20B and the third distance between the second external electrode 16 and the fourth external electrode 24B. Here, the second distance between the first external electrode 12 and the third external electrode 20B is the shortest distance between the first external electrode 12 and the third external electrode 20B on the first main surface S31 or the second main surface S32. Similarly, the third distance between the second external electrode 16 and the fourth external electrode 24B is the shortest distance between the second external electrode 16 and the fourth external electrode 24B on the first main surface S31 or the second main surface S32. By arranging the first to fourth external electrodes 12, 16, 20B, 24B so that the first distance is greater than at least one of the second distance and the third distance, crosstalk between the first external electrode 12 and the second external electrode 16 can be suppressed.

[0088] The first external electrode 12 may be provided on at least one of the first side surface S21 and the second side surface S22, and the second external electrode 16 may be provided on at least one of the first side surface S21 and the second side surface S22.

[0089] 19 , the first external electrode 12 may be provided in the center of the second side surface S22 in the first direction, and the second external electrode 16 may be provided in the center of the first side surface S21 in the first direction. The first internal electrode 13 has a first opposing portion 14 and a first lead portion 15 that protrudes, for example, rearward from the first opposing portion 14 along the second direction, and the first lead portion 15 is connected to the first external electrode 12. The second internal electrode 17 has a second opposing portion 18 and a second lead portion 19 that protrudes, for example, frontward from the second opposing portion 18 along the second direction, and the second lead portion 19 is connected to the second external electrode 16.

[0090] In this multilayer varistor 1, the first external electrode 12 and the second external electrode 16 are arranged in the center in the first direction, so that it is possible to widen the gap between the first external electrode 12 and the second external electrode 16 and the third external electrode 20B and the fourth external electrode 24B, thereby reducing the electrostatic capacitance between the first external electrode 12 and the second external electrode 16 and the third external electrode 20B and the fourth external electrode 24B, and suppressing crosstalk.

[0091] 20, the first opposing portion 14 may be disposed in a region overlapping with approximately the right half of the third opposing portion 22 in the third direction, and the second opposing portion 18 may be disposed in a region overlapping with approximately the left half of the third opposing portion 22 in the third direction. This makes it possible to reduce the region where the first opposing portion 14 and the second opposing portion 18 overlap when viewed from the third direction, thereby reducing the capacitance between the first external electrode 12 and the second external electrode 16 and suppressing the occurrence of crosstalk.

[0092] (summary) The multilayer varistor (1) of the first aspect comprises a sintered body (11), a first internal electrode (13), a second internal electrode (17), a third internal electrode (21), a first external electrode (12), a second external electrode (16), a third external electrode (20, 20A), and a fourth external electrode (24, 24A). The sintered body (11) has a first end face (S11) and a second end face (S12) facing each other in a first direction, a first side face (S21) and a second side face (S22) facing each other in a second direction, and a first main face (S31) and a second main face (S32) facing each other in a third direction. The sintered body (11) is formed in the shape of a rectangular parallelepiped with its long sides in the first direction, and has a laminated structure in which a plurality of layers (LY11 to LY14) are laminated along the third direction. The first internal electrode (13) is provided on a first stacking surface (SF1) inside the sintered body (11). The second internal electrode (17) is provided on a second stacking surface (SF2) different from the first stacking surface (SF1) inside the sintered body (11). The third internal electrode (21) is provided on a third stacking surface (SF3) between the first stacking surface (SF1) and the second stacking surface (SF2) inside the sintered body (11). The first external electrode (12) is provided on at least one of the first side surface (S21) and the second side surface (S22) and is electrically connected to the first internal electrode (13). The second external electrode (16) is provided on at least one of the first side surface (S21) and the second side surface (S22) and is electrically connected to the second internal electrode (17). The third external electrode (20, 20A) and the fourth external electrode (24, 24A) are provided on at least one of the first side surface (S21) and the second side surface (S22) and are electrically connected to the third internal electrode (21). The third internal electrode (21) has a first overlapping region (A1) that overlaps with at least a portion of the first internal electrode (13) in the third direction and a second overlapping region (A2) that overlaps with at least a portion of the second internal electrode (17) in the third direction. In the first direction, the first external electrode (12) and the second external electrode (16) are provided between the third external electrode (20, 20A) and the fourth external electrode (24, 24A).

[0093] According to this embodiment, it is possible to obtain a multilayer varistor (1) that suppresses the occurrence of crosstalk. Also, the multilayer varistor (1) can be connected to the balanced line without bending the path.

[0094] In the laminated varistor (1) of the second aspect, in the first aspect, the first external electrode (12) includes a first electrode (51) provided on the first side surface (S21) and a second electrode (52) provided on the second side surface (S22). The first electrode (51) and the second electrode (52) are electrically connected via the first internal electrode (13). The second external electrode (16) includes a third electrode (53) provided on the first side surface (S21) and a fourth electrode (54) provided on the second side surface (S22). The third electrode (53) and the fourth electrode (54) are electrically connected via the second internal electrode (17). The third external electrode (20, 20A) includes a fifth electrode (55) provided on the first side surface (S21) and a sixth electrode (56) provided on the second side surface (S22). The fifth electrode (55) and the sixth electrode (56) are electrically connected via the third internal electrode (21). The fourth external electrode (24, 24A) includes a seventh electrode (57) provided on the first side surface (S21) and an eighth electrode (58) provided on the second side surface (S22). The seventh electrode (57) and the eighth electrode (58) are electrically connected via the third internal electrode (21).

[0095] According to this embodiment, by connecting the first to eighth electrodes (51 to 58) to the substrate, the mounting strength of the multilayer varistor (1) to the substrate can be improved.

[0096] In the multilayer varistor (1) of the third aspect, in the second aspect, the third internal electrode (21) has a third opposing portion (22), a third extended portion (23), and a fourth extended portion (27). The third extended portion (23) includes a first connecting portion (231) and a first protruding portion (232). The first connecting portion (231) connects the fifth electrode (55) and the sixth electrode (56). The first protruding portion (232) is narrower than the third opposing portion (22), protrudes from the third opposing portion (22) in the first direction, and is connected to the first connecting portion (231). The fourth extended portion (27) includes a second connecting portion (271) and a second protruding portion (272). The second connecting portion (271) connects the seventh electrode (57) and the eighth electrode (58). The second protruding portion (272) is narrower than the third opposing portion (22), protrudes from the third opposing portion (22) in the first direction, and is connected to the second connecting portion (271).

[0097] According to this embodiment, the stray capacitance between the first external electrode (12) and the second external electrode (16) can be reduced, and the occurrence of crosstalk can be suppressed.

[0098] The laminated varistor (1) of the fourth aspect comprises a sintered body (11), a first internal electrode (13), a second internal electrode (17), a third internal electrode (21), a first external electrode (12), a second external electrode (16), a third external electrode (20B), and a fourth external electrode (24B). The sintered body (11) has a first end face (S11) and a second end face (S12) facing each other in a first direction, a first side face (S21) and a second side face (S22) facing each other in a second direction, and a first main face (S31) and a second main face (S32) facing each other in a third direction. The sintered body (11) is formed in the shape of a rectangular parallelepiped with its long sides in the first direction, and has a laminated structure in which a plurality of layers (LY11 to LY14) are stacked along the third direction. The first internal electrode (13) is provided on a first stacking surface (SF1) inside the sintered body (11). The second internal electrode (17) is provided on a second stacking surface (SF2) different from the first stacking surface (SF1) inside the sintered body (11). The third internal electrode (21) is provided on a third stacking surface (SF3) between the first stacking surface (SF1) and the second stacking surface (SF2) inside the sintered body (11). The first external electrode (12) is provided on at least one of the first side surface (S21) and the second side surface (S22) and is electrically connected to the first internal electrode (13). The second external electrode (16) is provided on at least one of the first side surface (S21) and the second side surface (S22) and is electrically connected to the second internal electrode (17). The third external electrode (20B) is provided on the first end surface (S11) and is electrically connected to the third internal electrode (21). The fourth external electrode (24B) is provided on the second end surface (S12) and is electrically connected to the third internal electrode (21). The third internal electrode (21) has a first overlapping region (A1) that overlaps with at least a portion of the first internal electrode (13) in the third direction and a second overlapping region (A2) that overlaps with at least a portion of the second internal electrode (17) in the third direction. In the first direction, the first external electrode (12) and the second external electrode (16) are provided between the third external electrode (20B) and the fourth external electrode (24B).

[0099] According to this embodiment, it is possible to obtain a multilayer varistor (1) that suppresses the occurrence of crosstalk. Also, the multilayer varistor (1) can be connected to the balanced line without bending the path.

[0100] In the multilayer varistor (1) of the fifth aspect, in any one of the first to fourth aspects, in the third internal electrode (21), the first overlapping region (A1) and the second overlapping region (A2) at least partially overlap.

[0101] According to this embodiment, it is possible to obtain a multilayer varistor (1) that suppresses the occurrence of crosstalk.

[0102] In the laminated varistor (1) of the sixth aspect, in any one of the first to fourth aspects, the first overlapping region (A1) and the second overlapping region (A2) are in different regions in the third internal electrode (21).

[0103] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0104] In the multilayer varistor (1) of the seventh aspect, in any one of the first to sixth aspects, the third external electrode (20, 20A, 20B), the first external electrode (12), the second external electrode (16), and the fourth external electrode (24, 24A, 24B) are arranged in this order in the first direction. The first distance (L1) is greater than at least one of the second distance (L2) and the third distance (L3). The first distance (L1) is the distance between the first external electrode (12) and the second external electrode (16). The second distance (L2) is the distance between the third external electrode (20, 20A, 20B) and the first external electrode (12). The third distance (L3) is the distance between the second external electrode (16) and the fourth external electrode (24, 24A, 24B).

[0105] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0106] In the multilayer varistor (1) of the eighth aspect, in any one of the first to seventh aspects, the first internal electrode (13) has a first opposing portion (14) and a first lead portion (15) narrower in width than the first opposing portion (14).

[0107] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0108] In the laminated varistor (1) of the ninth aspect, in the eighth aspect, the width of the first lead portion (15) in the first direction is 90% or less of the width of the first opposing portion (14).

[0109] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0110] In the multilayer varistor (1) of the tenth aspect, in the eighth or ninth aspect, the second internal electrode (17) has a second opposing portion (18) and a second lead portion (19) narrower in width than the second opposing portion (18).

[0111] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0112] In the laminated varistor (1) of the eleventh aspect, in the tenth aspect, the width of the second lead portion (19) in the first direction is 90% or less of the width of the second opposing portion (18).

[0113] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0114] In the multilayer varistor (1) of the twelfth aspect, in the tenth or eleventh aspect, the third internal electrode (21) has a third opposing portion (22), a third lead portion (23), and a fourth lead portion (27), the third lead portion (23) is connected to the third external electrode (20, 20A, 20B) and has a width narrower than the third opposing portion (22). The fourth lead portion (27) is connected to the fourth external electrode (24, 24A, 24B) and has a width narrower than the third opposing portion (22).

[0115] According to this embodiment, the occurrence of crosstalk between the first external electrode (12) and the second external electrode (16) can be further suppressed.

[0116] In the laminated varistor (1) of the thirteenth aspect, in the twelfth aspect, the length of the third opposing portion (22) in the first direction is longer than the length of the first opposing portion (14), and the length of the third opposing portion (22) is longer than the length of the second opposing portion (18).

[0117] According to this aspect, even if the relative position of the third opposing portion (22) with respect to the first opposing portion (14) and the second opposing portion (18) in the first direction is slightly shifted, the third opposing portion (22) is more likely to face the entire first opposing portion (14) and the entire second opposing portion (18), respectively, and changes in capacitance can be suppressed.

[0118] In the laminated varistor (1) of the fourteenth aspect, in the twelfth or thirteenth aspect, the length of the third opposing portion (22) in the first direction is 107.5% or more and 115% or less of the lengths of the first opposing portion (14) and the second opposing portion (18).

[0119] According to this aspect, it is possible to suppress the occurrence of crosstalk and also suppress the change in capacitance due to manufacturing deviations.

[0120] In the laminated varistor (1) of the 15th aspect, in any one of the 12th to 14th aspects, the length of the third opposing portion (22) in the second direction is longer than the length of the first opposing portion (14), and the length of the third opposing portion (22) is longer than the length of the second opposing portion (18).

[0121] According to this aspect, even if the relative position of the third opposing portion (22) with respect to the first opposing portion (14) and the second opposing portion (18) in the second direction is slightly shifted, the third opposing portion (22) is more likely to face the entire first opposing portion (14) and the entire second opposing portion (18), respectively, and changes in capacitance can be suppressed.

[0122] In the laminated varistor (1) of the sixteenth aspect, in any one of the twelfth to fifteenth aspects, the length of the third opposing portion (22) in the second direction is 107.5% or more and 115% or less of the lengths of the first opposing portion (14) and the second opposing portion (18).

[0123] According to this aspect, it is possible to suppress the occurrence of crosstalk and also suppress the change in capacitance due to manufacturing deviations.

[0124] In the laminated varistor (1) of the seventeenth aspect, in any one of the twelfth to sixteenth aspects, the area of ​​the third opposing portion (22) is larger than the area of ​​the first opposing portion (14), and the area of ​​the third opposing portion (22) is larger than the area of ​​the second opposing portion (18).

[0125] According to this aspect, even if the relative position of the third opposing portion (22) with respect to the first opposing portion (14) and the second opposing portion (18) shifts slightly in the first direction or the second direction, the third opposing portion (22) is more likely to face the entire first opposing portion (14) and the entire second opposing portion (18), respectively, thereby suppressing changes in capacitance.

[0126] In the laminated varistor (1) of the 18th aspect, in any one of the 12th to 17th aspects, the third lead portion (23) has a first protruding portion (232) protruding in the first direction from the third opposing portion (22). The fourth lead portion (27) has a second protruding portion (272) protruding in the first direction from the third opposing portion (22). The width of the first protruding portion (232) in the second direction is 90% or less of the width of the third opposing portion (22), and the width of the second protruding portion (272) in the second direction is 90% or less of the width of the third opposing portion (22).

[0127] According to this aspect, the occurrence of crosstalk can be suppressed.

[0128] In the multilayer varistor (1) of the nineteenth aspect, in any one of the eighth to eighteenth aspects, the first opposing portion (14) is located at a position not overlapping with the second external electrode (16) in the third direction.

[0129] According to this aspect, the occurrence of crosstalk can be suppressed.

[0130] In the multilayer varistor (1) of the twentieth aspect, in any one of the tenth to eighteenth aspects, the second opposing portion (18) is located at a position not overlapping the first external electrode (12) in the third direction.

[0131] According to this aspect, the occurrence of crosstalk can be suppressed.

[0132] The laminated varistor (1) of the 21st aspect is any one of the first to 20th aspects, and includes a first varistor (1A) and a second varistor (1B). The first varistor (1A) is formed between the first external electrode (12) and the third external electrode (20, 20A, 20B). The second varistor (1B) is formed between the second external electrode (16) and the fourth external electrode (24, 24A, 24B). The capacitances of the first varistor (1A) and the second varistor (1B) are each 200 pF or less. The difference between the capacitance of the first varistor (1A) and the capacitance of the second varistor (1B) is -20% or more and +20% or less of the capacitance of the first varistor (1A).

[0133] According to this embodiment, the occurrence of crosstalk can be suppressed, and when this laminated varistor (1) is used in a communication circuit, the communication quality can be improved.

[0134] The multilayer varistor according to the present invention can reduce the stray capacitance generated between the external electrodes, thereby making it possible to obtain a multilayer varistor with reduced crosstalk, which is industrially useful. [Explanation of symbols]

[0135] 1 Multilayer varistor 1A 1st Varistor 1B Second Varistor 11 Sintered body 12 1st external electrode 13 1st internal electrode 14 First opposing part 15 First drawer section 16 2nd external electrode 17 Second internal electrode 18 Second opposing part 19 Second drawer section 20,20A,20B 3rd external electrode 21 3rd internal electrode 22 Third opposing part 23 Third drawer 24,24A,24B 4th external electrode 51 1st electrode 52 2nd electrode 53 3rd electrode 54 4th electrode 55 5th electrode 56 6th electrode 57 7th electrode 58 8th electrode 231 1st connection part 232 1st protrusion 271 2nd connection part 272 Second protrusion A1 First overlapping area A2 2nd superimposition area L1 1st distance L2 2nd distance L3 Third distance LY11~LY14 layer S11 1st end surface S12 2nd end face S21 1st side S22 2nd side S31 First main surface S32 Second main surface SF1 1st laminated surface SF2 2nd laminated surface SF3 3rd laminated surface

Claims

1. a sintered body having a first end face and a second end face opposing each other in a first direction, a first side face and a second side face opposing each other in a second direction, and a first main face and a second main face opposing each other in a third direction, the sintered body being formed in the shape of a rectangular parallelepiped with the long sides extending in the first direction, and having a laminated structure in which a plurality of layers are laminated along the third direction; a first internal electrode provided on a first lamination surface inside the sintered body; a second internal electrode provided on a second lamination surface different from the first lamination surface inside the sintered body; a third internal electrode provided on a third lamination surface between the first lamination surface and the second lamination surface inside the sintered body; a first external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the first internal electrode; a second external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the second internal electrode; a third external electrode and a fourth external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the third internal electrode, the third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction, the first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion; the second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion, the third internal electrode has a third opposing portion, In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion, In the first direction, the first external electrode and the second external electrode are provided between the third external electrode and the fourth external electrode, the first external electrode includes a first electrode provided on the first side surface and a second electrode provided on the second side surface, the first electrode and the second electrode being electrically connected via the first internal electrode; the second external electrode includes a third electrode provided on the first side surface and a fourth electrode provided on the second side surface, the third electrode and the fourth electrode being electrically connected via the second internal electrode; the third external electrode includes a fifth electrode provided on the first side surface and a sixth electrode provided on the second side surface, the fifth electrode and the sixth electrode being electrically connected via the third internal electrode; the fourth external electrode includes a seventh electrode provided on the first side surface and an eighth electrode provided on the second side surface, and the seventh electrode and the eighth electrode are electrically connected via the third internal electrode; Multilayer varistor.

2. The third internal electrode further has a third lead-out portion and a fourth lead-out portion, the third extension portion includes a first connection portion that connects the fifth electrode and the sixth electrode, and a first protrusion that is narrower than the third opposing portion, protrudes from the third opposing portion along the first direction, and is connected to the first connection portion; the fourth extension portion includes a second connecting portion that connects the seventh electrode and the eighth electrode, and a second protruding portion that is narrower than the third opposing portion, protrudes from the third opposing portion along the first direction, and is connected to the second connecting portion; The multilayer varistor according to claim 1 .

3. In the third internal electrode, the first overlapping region and the second overlapping region at least partially overlap.

3. The multilayer varistor according to claim 1 or 2.

4. In the third internal electrode, the first overlapping region and the second overlapping region are in different regions from each other. The multilayer varistor according to any one of claims 1 to 3.

5. In the first direction, the third external electrode, the first external electrode, the second external electrode, and the fourth external electrode are arranged in this order; a first distance between the first external electrode and the second external electrode is greater than at least one of a second distance between the third external electrode and the first external electrode and a third distance between the second external electrode and the fourth external electrode; The multilayer varistor according to any one of claims 1 to 4.

6. In the first direction, the width of the first drawer portion is 90% or less of the width of the first opposing portion. The multilayer varistor according to any one of claims 1 to 5.

7. The width of the second drawer portion in the first direction is 90% or less of the width of the second opposing portion. The multilayer varistor according to any one of claims 1 to 6.

8. In the first direction, the length of the third opposing portion is longer than the length of the first opposing portion, and the length of the third opposing portion is longer than the length of the second opposing portion; The multilayer varistor according to any one of claims 1 to 7.

9. In the first direction, the length of the third opposing portion is 107.5% or more and 115% or less of the lengths of the first opposing portion and the second opposing portion. The multilayer varistor according to any one of claims 1 to 8.

10. In the second direction, the length of the third opposing portion is longer than the length of the first opposing portion, and the length of the third opposing portion is longer than the length of the second opposing portion; The multilayer varistor according to any one of claims 1 to 9.

11. In the second direction, the length of the third opposing portion is 107.5% or more and 115% or less of the lengths of the first opposing portion and the second opposing portion. The multilayer varistor according to any one of claims 1 to 10.

12. The area of ​​the third opposing portion is larger than the area of ​​the first opposing portion, and the area of ​​the third opposing portion is larger than the area of ​​the second opposing portion. The multilayer varistor according to any one of claims 1 to 11.

13. The width of the first protruding portion in the second direction is 90% or less of the width of the third opposing portion, a width of the second protruding portion in the second direction being 90% or less of a width of the third opposing portion; The multilayer varistor according to claim 2 .

14. The first opposing portion is located in a position that does not overlap with the second external electrode in the third direction. The multilayer varistor according to any one of claims 1 to 13.

15. The second opposing portion is located in a position that does not overlap the first external electrode in the third direction. The multilayer varistor according to any one of claims 1 to 14.

16. A first varistor formed between the first external electrode and the third external electrode; a second varistor formed between the second external electrode and the fourth external electrode, the capacitance of the first varistor and the second varistor is 200 pF or less, a difference between the capacitance of the first varistor and the capacitance of the second varistor is −20% or more and +20% or less of the capacitance of the first varistor; The multilayer varistor according to any one of claims 1 to 15.

17. A sintered body having a first end face and a second end face that are opposite each other in a first direction, a first side face and a second side face that are opposite each other in a second direction, and a first main face and a second main face that are opposite each other in a third direction, and formed in the shape of a rectangular parallelepiped with the first direction as the long side, and having a laminated structure in which a plurality of layers are stacked along the third direction; a first internal electrode provided on a first lamination surface inside the sintered body; a second internal electrode provided on a second lamination surface different from the first lamination surface inside the sintered body; a third internal electrode provided on a third lamination surface between the first lamination surface and the second lamination surface inside the sintered body; a first external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the first internal electrode; a second external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the second internal electrode; a third external electrode provided on the first end surface and electrically connected to the third internal electrode; a fourth external electrode provided on the second end surface and electrically connected to the third internal electrode, the third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction, the first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion; the second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion, the third internal electrode has a third opposing portion, In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion, the third external electrode, the first external electrode, the second external electrode, and the fourth external electrode are arranged in this order in the first direction; a first distance between the first external electrode and the second external electrode is greater than at least one of a second distance between the third external electrode and the first external electrode and a third distance between the second external electrode and the fourth external electrode; Multilayer varistor.

18. A sintered body having a first end face and a second end face that are opposite each other in a first direction, a first side face and a second side face that are opposite each other in a second direction, and a first main face and a second main face that are opposite each other in a third direction, and formed in the shape of a rectangular parallelepiped with the first direction as the long side, and having a laminated structure in which a plurality of layers are stacked along the third direction; a first internal electrode provided on a first lamination surface inside the sintered body; a second internal electrode provided on a second lamination surface different from the first lamination surface inside the sintered body; a third internal electrode provided on a third lamination surface between the first lamination surface and the second lamination surface inside the sintered body; a first external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the first internal electrode; a second external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the second internal electrode; a third external electrode and a fourth external electrode provided on at least one of the first side surface and the second side surface and electrically connected to the third internal electrode, the third internal electrode has a first overlapping region that overlaps with at least a portion of the first internal electrode in the third direction and a second overlapping region that overlaps with at least a portion of the second internal electrode in the third direction, the first internal electrode has a first opposing portion and a first lead portion that is narrower than the first opposing portion; the second internal electrode has a second opposing portion and a second lead portion that is narrower than the second opposing portion, the third internal electrode has a third opposing portion, In the third direction, the third opposing portion covers the entire periphery of the first opposing portion and the second opposing portion, the third external electrode, the first external electrode, the second external electrode, and the fourth external electrode are arranged in this order in the first direction; a first distance between the first external electrode and the second external electrode is greater than at least one of a second distance between the third external electrode and the first external electrode and a third distance between the second external electrode and the fourth external electrode; Multilayer varistor.

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