Electric circuit with an electric component and said electric component

Abstract

The invention relates to a circuit (16), in particular an intermediate circuit (16), comprising an electrical component (1, 101), as well as said electrical component (1, 101) comprising a housing (2, 102) and a pyrotechnic switching element (3) provided in the housing (2, 102). Advantageously, the electrical component (1, 101) comprises a resistor (4), in particular a thermal melting resistor, provided in the housing (2, 102), wherein the pyrotechnic switching element (3) and the resistor (4) are electrically connected in series, and wherein the resistor (4) comprises a resistor element (6), in particular formed by a resistor wire (6a, 106a), and an arc extinguishing agent (7), in particular in powder and / or granular form, which surrounds the resistor element (6) at least in sections along its length, in particular completely.

Description

[0001] The invention relates to an electrical component with a housing and with a pyrotechnic switching element provided in the housing.

[0002] An electrical component, namely a pyrotechnic switch, is known from the prior art. It comprises a housing, in particular an outer housing, and a pyrotechnic switching element provided within the housing. Such a pyrotechnic switch is often used to protect an electrical assembly – for example, in vehicle construction. Depending on the application, the pyrotechnic switching element interrupts or opens an electrical current path through the electrical component. If, for example, a malfunction occurs in the vehicle, this pyrotechnic component is activated, thus closing a current path for discharging in order to bring the vehicle into a safe, de-energized state. To limit the current flow, electrical resistors are often also located in this discharge path of the electronic circuit.Circuits with pyrotechnic components are comparatively complex to design, for example, in the layout of directly connected electrical components in the discharge circuit. This is especially true in the high-voltage range.

[0003] In addition, in addition to replacing the activated pyrotechnic switching element, it is often necessary - not only for safety reasons - to replace other components in the discharge current path, since the impairment of their function due to the undefined malfunction cannot be ruled out.

[0004] The invention therefore has the object of creating an electrical component which can simplify the construction of the electronic and / or electrical circuit while being highly stable and reliable in operation.

[0005] If necessary, the electrical component should also be suitable for a fast-reacting safety function.

[0006] The invention solves the problem by the features of claim 1.

[0007] By having the electrical component with a resistor provided in the housing, with the pyrotechnic switching element and the resistor connected in series, the electrical component can not only be electrically functionally expanded, but also further improves its stability due to resistance-induced current limitation. Furthermore, the resistor in the electrical component can reliably limit the energy through the electrical component, which, for example, protects an electronic and / or electrical circuit connected to its current path. This can also make it possible to replace only the component activated in the pyrotechnic switching element in the circuit, which can lead to a cost-effective and user-friendly maintenance option.

[0008] If the resistor also has a resistance element and an arc quenching agent that surrounds the resistance element, in particular completely surrounds it, at least in sections along its path, this can improve the operational reliability of the electrical component. Due to the surrounding arc quenching agent, in the event of an electrical overload of the resistor, the arc quenching agent can remove the vaporized resistance element from an arc path relatively quickly and, on the other hand, can also cool an arc relatively quickly. This is all the more efficient if the arc quenching agent completely surrounds the resistance element, for example, embeds it. For example, a powder and / or granular arc quenching agent can be used and / or, for example, the resistance element can be formed by a resistance wire. The resistance element can also preferably be a thermal fusible resistor.

[0009] The electrical component according to the invention is therefore - with structural simplicity - reliable and stable.

[0010] The housing is preferably electrically insulating, for example the housing is made of a plastic.

[0011] Preferably, the resistance element is surrounded by the arc-quenching agent, at least in sections, in particular completely, along its winding path. For example, the winding path makes it possible to preset the resistance value or the electrical resistance to a correspondingly high value – reliably despite comparatively high power levels and the associated comparatively high thermal expansion of the resistance wire. This is especially true when the arc-quenching agent is in powder and / or granular form, thus allowing for increased thermal expansion of the resistance wire.

[0012] For example, the resistance element can be wound in a meandering, spiral, and / or helical configuration. This allows for higher resistance values ​​with a compact longitudinal extension. It is also conceivable for the resistance wire to be wound bifilarly, for example, to minimize or avoid parasitic inductances in the resistance wire.

[0013] Preferably, the electrical component has at least two electrical connections, and the pyrotechnic switching element and the resistor are provided in the current path of the electrical component between the at least two electrical connections. The two electrical connections are arranged, for example, on the outside of the housing. Contact tongues are conceivable as electrical connections. Furthermore, at least one further electrical connection for switching the pyrotechnic switching element is conceivable.

[0014] Component safety on the electrical component can be further increased if the housing has two encapsulated sections, one housing section housing the pyrotechnic switching element and the other housing section housing the resistor. For example, this spatial separation can further reduce mutual interference between the switching element and the resistor.

[0015] In this case, it is conceivable, for example, for the second housing section to have a longitudinal extension that essentially extends around the first housing section, in particular concentrically, in order to further reduce the structural dimensions of the electrical component. It is thus also conceivable for the resistance element to be arranged circumferentially relative to the pyrotechnic switching element, as seen in plan view, which can contribute to a reduction in the overall height of the electrical component. This arrangement can also be made even more space-saving if the resistance element is arranged concentrically relative to the pyrotechnic switching element, as seen in plan view.

[0016] Alternatively, it is conceivable that the second housing section has a longitudinal extension extending laterally away from the first housing section.

[0017] The pyrotechnic switching element can be designed to be comparatively simple in construction, for example, if this pyrotechnic switching element has a pyrotechnic charge, two current conductor sections of a current conductor arranged separated from one another by a gap, and a bridging element which is arranged separately from at least one of the two current conductor sections in an initial position before ignition of the pyrotechnic charge and is in electrical contact with both current conductor sections in a bridging position after ignition of the pyrotechnic charge.

[0018] For example, the resistor's suitability for high-power applications can be further improved if the resistance element can non-destructively absorb a specified energy of at least 0.1 kJ (kilojoules) to discharge a capacitor. This is even more so if the resistance element can non-destructively absorb the specified energy of at least 0.5 kJ, for example, at least 1.0 kJ.

[0019] The specified energy can be determined, for example, under the following conditions: discharging a capacitor with a capacitance C of 2 mF (millifarad) via the resistor while applying a voltage U of 400 V (volts) across the resistor and the capacitor, which are connected in series.

[0020] For example, non-destructive recording can be fulfilled if the resistance value of the resistor changes by a maximum of +- 10%.

[0021] The design of the resistor can be further simplified with regard to its function as a thermal fuse resistor if the resistance element forms a fusible part of the resistor designed as a fuse. This eliminates the need for additional structural measures to ensure the resistance and fuse functions.

[0022] Preferably, the resistance element melts when the specified energy for discharging a capacitor is exceeded, at the latest when the specified energy is exceeded by 50%, whereby the resistor can reliably fulfil a safety function.

[0023] For example, the resistance element is designed to melt if the specified energy for discharging a capacitor is exceeded by 10 to 50%. This can allow for short-term thermal overloads, preventing unwanted fuse blows and thus further increasing the operational reliability of the fuse resistor. This is even more so if the resistance element melts if the specified energy for discharging a capacitor is exceeded by 10 to 20%.

[0024] It is also conceivable for the arc-quenching agent to be directly in contact with the resistance element. This could, for example, be the bare resistance wire to further increase stability. It is also conceivable for the arc-quenching agent to be directly in contact with an oxidized surface of the resistance wire.

[0025] The above can be further improved, for example, if a sheath made of the arc-extinguishing agent surrounding the resistance element has a sheath thickness of at least 0.5 mm (millimeters) radially outward from the resistance element. For example, a sheath thickness of at least 1 mm is particularly advantageous. The sheath can have any outer contour. This outer contour can be, for example, curved, circular, angular, oval, etc.

[0026] For example, the operational reliability of the fusible resistor can be further increased if the arc-extinguishing agent completely surrounds at least 90% of the length of the wound resistor element. For example, the arc-extinguishing agent completely surrounds at least 95% of the length of the wound resistor element.

[0027] If the arc extinguishing agent consists of sand, for example, this can be advantageous for rapid arc extinguishing. Preferably, the arc extinguishing agent can consist of quartz sand (SiO 2 ).

[0028] A resistance wire made of NiCr can prove particularly stable despite the specified and comparatively high energy. It is also conceivable for the resistance wire to contain Cr and Ni as alloying elements, for example, a stainless steel wire.

[0029] The resistor preferably has an electrical resistance of ≥ 0.1 ohms, in particular ≥ 10 ohms. For example, the resistor can have an electrical resistance of ≥ 20 ohms, ≥ 30 ohms, or ≥ 40 ohms. The electrical resistance of the resistor is preferably in the range of 0.1 to 400 ohms, for example in the range of 0.1 to 100 ohms or in the range of 20 to 400 ohms. The above-mentioned electrical resistance of the resistor preferably also corresponds to the electrical resistance of the resistance wire.

[0030] It is conceivable that the resistor has a rated power P70 in the range of 1 to 250 W (watts). For example, the resistor has a rated power P70 in the range of 3 to 150 W.

[0031] The resistor can be characterized, for example, if it has a temperature coefficient (TCR) of ≥ 20 ppm / K (10 -6 < / Kelvin), e.g., measured according to the DIN EN 60115-1 standard. For example, the resistance has ≥ 50 ppm / K. Preferably, the resistor has a temperature coefficient (TCR) of ≤ 2500 ppm / K, in particular ≤ 2000 ppm / K. The resistor can thus have a temperature coefficient (TCR) in the range of 20 to 2500 ppm / K or in the range of 50 to 2000 ppm / K.

[0032] Preferably, the resistor can be used for an intermediate circuit. In this case, the resistor can reliably form a discharge resistance in the intermediate circuit.

[0033] The figures show, for example, the subject matter of the invention in more detail using several embodiments. Fig. 1a side view of an electrical component according to a first embodiment, Fig. 1aan exploded view of the electrical component of the Fig. 1 , Fig. 2a side view of the electrical component according to Fig. 1 , Fig. 3 a plan view of the electrical component according to Fig. 1 with opened housing, Fig. 4 a side view of an electrical component according to a second embodiment, Fig. 4a an exploded view of the electrical component of the Fig. 4 , Fig. 5 a partially opened side view of the electrical component according to Fig. 4 , Fig. 6a cross section according to VI-VI of the Fig. 5 , Fig. 7of the electrical components according to the Figures 1 to 6 a line section of the resistance element with a jacket made of arc extinguishing agent in any conceivable shape and Fig. 8 a use of the Figures 1 to 6 shown electrical component in an intermediate circuit.

[0034] After the Figures 1 to 3 An electrical component 1 according to a first embodiment is shown. Fig. 1a that the electrical component 1 has a pyrotechnic switching element 3 provided in the housing 2.

[0035] Also visible on the electrical component 1 are its two electrical terminals 5a, 5b. These electrical terminals 5a, 5b are designed as contact tongues. The pyrotechnic switching element 3 is located in the current path between these two electrical terminals 5a, 5b. The pyrotechnic switching element 3 is intended to switch on an electrical connection in this current path.

[0036] In addition, as in the Figures 2 and 3As can be seen, the electrical component 1 in the housing 2 has, according to the invention, a resistor 4 that is electrically connected in series with the pyrotechnic switching element 3. The pyrotechnic switching element 3 and the resistor 4 are thus located in the current path between the two electrical terminals 5a, 5b. With the help of the resistor, the power via this current path can be limited, which can protect the electrical component 1, for example, against electrical overload.

[0037] In addition, the electrical resistor 4 is specially designed: The resistor 4 comprises a resistance element 6 formed by a resistance wire 6a and an arc extinguishing agent 7 that surrounds the resistance element 6 several times along its length, and completely surrounds it in these sections. Due to the design—in the exemplary embodiment—the resistance element rests several times against supports 2e of the housing 2, so that the complete encirclement is interrupted. Nevertheless, the resistance element 6 is thus embedded in the arc extinguishing agent 7 along its entire length.

[0038] This allows the resistance element 6 to reproducibly absorb a specified energy without electrical failure. Furthermore, the operational reliability of the electrical component 1 is increased, since arcing can be suppressed and / or avoided in the event of an overload. For this purpose, the electrical resistor 4 is preferably designed as a thermal fuse resistor.

[0039] As well as the Figures 1 to 4As can be seen, the resistance element 6 has a winding course in its longitudinal direction LR, which allows for an increased length at the resistance element 6 with a comparatively small extension. This facilitates setting a desired electrical resistance at the resistance element 6 or resistor 4. In addition, if the resistance element 6 is surrounded at least in sections by the arc extinguishing agent 7 in its winding course in its longitudinal direction LR, namely - as shown in the exemplary embodiment - completely, this can further improve the operational reliability of the electrical component 1.

[0040] The resistance element 6 also has a meandering, winding course transverse to its longitudinal direction LR, which follows a circular path in plan view. The resistance element 6 surrounds the pyrotechnic switching element 3 in plan view and is also arranged concentrically around the pyrotechnic switching element 3. This creates compact dimensions for the electrical component 1.

[0041] Again Fig. 1a As can be seen from the drawing, the meandering shape of the resistance element 6 is formed by a meandering bent resistance wire 6a. However, it is also conceivable that Fig. 1a It is shown in dashed lines that the resistance element 6 is formed by a punched resistance wire 6a.

[0042] Despite its compact design, high operational reliability is ensured because the housing 2 comprises two encapsulated housing sections 2a, 2b. A first housing section 2a of the two encapsulated housing sections 2a, 2b accommodates the pyrotechnic switching element 3, and a second housing section 2b of the two encapsulated housing sections 2a, 2b accommodates the resistor 4.

[0043] As in Fig. 3 As can be seen, the second housing section 2a completely encompasses the first housing section 2b. For this purpose, the second housing section has a concentric longitudinal extension running around the first housing section. As shown in Fig. 3As can be seen, the first housing section 2a is circular in cross-section and the second housing section 2b is circular in cross-section. Both housing sections 2a are separated from each other by an intermediate wall 2c of the housing 2. An outer wall 2d of the housing 2 further delimits the second housing section 2b in addition to the intermediate wall 2c, viewed radially. The housing 2 is - as for example in Fig. 1a As can be seen, it is constructed in several parts, namely with a one-piece lower part 14 and an upper part 15, which are screwed together using screw elements (not shown). This significantly simplifies the assembly of the resistance element 4 and the pyrotechnic switching element 3 to be encapsulated.

[0044] The pyrotechnic switching element 3 is also specially designed to close (switch on) an electrical connection in the current path between the two electrical terminals 5a, 5b, as shown in the Figures 1a , 2 and 3The pyrotechnic switching element 3 has a pyrotechnic charge 8 and two current conductor sections 10a, 10b arranged in the current path between the two electrical terminals 5a, 5b, separated from each other by a gap 9. Fig. 1a It can be seen that the first current conductor section 10a belongs to the electrical connection 5a and the second current conductor section 10b belongs to an electrical bridging element 11 provided in the housing 2.

[0045] The pyrotechnic switching element 3 also has an electrically conductive bridging element 11, which is mounted in the housing so that it can move downwards. Thus, the bridging element 11 is in a Fig. 2In the illustrated starting position 11a, before ignition of the pyrotechnic charge 8, the bridging element 11 is arranged separately from at least one of the two conductor sections 10a, 10b. This lies above the conductor sections 10a, 10b. Thus, there is no electrical connection between the two conductor sections 10a, 10b. The bridging element 11 is held in position by a piston 12 with spacer feet to prevent the bridging element 11 from unintentionally leaving this position.

[0046] In a dashed in Fig. 2 In the illustrated bridging position 11b, after ignition of the pyrotechnic charge 8, the bridging element 11 is in electrical contact with both conductor sections 10a, 10b, establishing the electrical connection between these conductor sections 10a, 10b. For this purpose, the pyrotechnic charge 8, as it expands, acts on the piston 12, which is moved with the bridging element 11 in the direction of the conductor sections 10a, 10b.

[0047] The pyrotechnic switching element 3 is activated and thus switched via a two-wire ignition line 8a, 8b, which is Fig. 1a and 2 can be seen. The ignition cable 8a, 8b is connected to a third electrical terminal 13 provided on the top side of the electrical component 1 and designed as a socket.

[0048] It may already be sufficient for a high operational reliability of the electrical component 1 if the resistance element 6 absorbs a predetermined energy for discharging a capacitor of at least 0.1 kJ without causing damage.

[0049] Protection of the electrical component 1 against overload is achieved by the resistance element 6 forming a fusible part of the resistor 4, which is designed as a fuse. Advantageously, the resistance element 6 melts when the specified energy, which is at least 0.5 kJ, is exceeded – and at the latest when the specified energy is exceeded by 20%. Thus, the resistance element 6 fulfills both an electrical resistance function and a thermal protection function.

[0050] In the exemplary embodiment, the resistance element 6 is formed by a stainless steel resistance wire 6a, which contains Cr and Ni as alloying elements. This wire absorbs a predetermined energy of 1.1 kJ non-destructively and is designed to melt if this predetermined energy is exceeded by 10 to 20%—specifically at an energy in the range of 1.1 kJ to 1.32 kJ, namely at 1.25 kJ.

[0051] To make all this possible, the resistance element 6 is completely surrounded by the granular arc extinguishing agent 7, namely quartz sand (SiO 2 ) in the exemplary embodiment, over its entire wire length. This arc extinguishing agent 7 lies directly against the resistance element 6, namely on the oxidized surface of the resistance wire. This can be Fig. 2 and Fig. 7 be recognized - in Fig. 1a and Fig. 3 The arc extinguishing agent 7 has not been shown for reasons of clarity. When the housing 2 is closed, this arc extinguishing agent 7 completely fills the second housing section 2b of the housing 2.

[0052] For this purpose, the sheath M made of the arc extinguishing agent 7 has a sheath thickness d from the resistance element 6 radially outwards of more than 1 mm. In addition, the sheath M completely surrounds more than 95% of the length L of the wound resistance wire 6a. The sheath M can have any external dimensions, for example, rectangular external dimensions, as in the Figures 2 and 6 to recognize.

[0053] Thanks to this comprehensive sheath M made of arc-extinguishing agent 7, the resistance element 6 can reduce thermal stresses through expansion, even at comparatively high energy levels, and thus reliably absorb this thermal load. Furthermore, this sheath M ensures rapid cooling of the arc if the resistance element 6 evaporates—resulting in a thermal fuse 4 that reacts quickly to electrical overload. Second embodiment:

[0054] After the Figures 4 to 6An electrical component 101 according to a second embodiment is shown. Unlike electrical component 101, the housing 102 of electrical component 101 is designed differently in this second embodiment.

[0055] As in Fig. 6 As can be seen, the second housing section 102b protrudes laterally from the first housing section 102b. The second housing section 102a directly adjoins the first housing section 102a with its front end, which ensures a resilient mechanical connection between the two encapsulated housing sections 102a, 102b.

[0056] The housing 102 is constructed in several parts—as can be seen, for example, in Fig. 2a—namely, with a one-piece lower part 114 and two upper parts 115a, 115b, which are screwed together using screw elements (not shown). This significantly simplifies the assembly of the pyrotechnic switching element 3, which is to be encapsulated by the first housing section 102a, and the resistance element 4, which is to be encapsulated by the second housing section 102b.

[0057] In both embodiments, the housing 2, 102 has a one-piece lower part 14, 114 and at least one upper part 15, 115a, 115b.

[0058] The electrical component 101 does not differ significantly from that shown in the first embodiment with regard to the pyrotechnic switching element 3 and is also located in the current path between the two electrical terminals 5a, 5b. The resistor 4 is also electrically connected in series with the pyrotechnic switching element 3.

[0059] The resistor 4 also has the resistance element 6, which is designed as a resistance wire 106a - as in Fig. 4a and Fig. 6 The granular arc extinguishing agent, namely quartz sand (SiO 2 ) here as well, completely surrounds the resistance wire 106a with a sheath M. This complete enclosure is at least 95% of the length L of the wound resistance wire 106a. The sheath M can have any desired external dimensions, as already mentioned for the first embodiment.

[0060] The resistance element 6, namely the resistance wire 106a, also has a meandering wound course in the longitudinal direction LR, which longitudinal direction LR is directed towards the pyrotechnic switching element 3. The meandering wound resistance wire 106a extends in a plane, as in Fig. 4a to recognize.

[0061] Again Fig. 4aAs can be seen, the meandering shape of the resistance element 6 is formed by the meandering bent resistance wire 6a. However, it is also conceivable that Fig. 4a It is shown in dashed lines that the resistance element 6 is helical and, according to the embodiment, is formed by a helically bent resistance wire 6a. Key figures:

[0062] All electrical components 1, 101 have the following characteristics of the resistor 4 in common: Resistance parameters Electrical resistance 0.2 ohms Rated power P70 3 W Nominal voltage 900 V Permissible energy 1.1 kJ Temperature coefficient (TCR) 1170 ppm / K Fuse parameters Melting energy 1.25 kJ

[0063] This resistor 4 can reliably fulfill both a resistance function and a fuse function. The latter can, for example, serve as a fuse if another switching element is defective, thus preventing an electrical overload. Such a situation can occur, for example, if a circuit breaker for disconnecting the electrical power supply, for example, a battery, is defective, but the pyrotechnic switching element 3 for discharging, for example, an intermediate circuit, has been activated. This dual function of the electrical component 1, 101 is ensured in a stable and responsive manner – and this is achieved even while maintaining a compact design. Circuit arrangement:

[0064] As in Fig. 8As can be seen, the electrical component 1, 101 is used in an intermediate circuit designed as a voltage intermediate circuit as an example of an electrical and / or electronic circuit 16 between the rectifier 17 and the pulse controller 18. An electrical component 1, 101 can be understood, for example, as a component of a circuit that cannot be physically subdivided further without losing its function.

[0065] The electrical component 1, 101 is used to discharge, for example, a capacitor 19. The discharge is enabled by closing the pyrotechnic switching element 3 of the electrical component 1, 101. The intermediate circuit 16 can thus discharge via the resistor 4 of the electrical component 1, 101. Such a discharge can occur, for example, when a high-voltage battery of a high-voltage system is disconnected from the load circuit.

[0066] This circuit 16 can be used in a vehicle, for example, in the circuit for supplying power via a battery. Vehicles can be a land vehicle, motor vehicle, watercraft, or aircraft. The battery can be, for example, a traction battery.

[0067] In general, it is noted that "in particular" can be translated into English as "more particularly." A feature preceded by "in particular" is considered an optional feature that can be omitted and thus does not constitute a limitation, for example, of the claims. The same applies to "vorzugsweise," which translates into English as "preferably."

Claims

1. Electrical component with a housing (2, 102) and with a pyrotechnic switching element (3) provided in the housing (2, 102), characterized in that the electrical component (1, 101) has a resistor (4), in particular a thermal melting resistor, provided in the housing (2, 102), wherein the pyrotechnic switching element (3) and the resistor (4) are electrically connected in series, and wherein the resistor (4) has a resistor element (6), in particular formed by a resistor wire (6a, 106a), and an arc extinguishing agent (7), in particular in powder and / or granular form, which surrounds the resistor element (6) at least in sections along its length, in particular completely.

2. Electrical component according to claim 1, characterized in that the resistance element (6) is surrounded in its winding course at least in sections by the arc extinguishing agent (7), in particular is completely surrounded.

3. Electrical component according to claim 2, characterized in that the resistance element (6) is wound in a meandering, spiral and / or helical manner.

4. Electrical component according to one of claims 1 to 3, characterized in that the electrical component (1, 101) has at least two electrical connections (5a, 5b), and that the pyrotechnic switching element (3) and the resistor (4) are provided in the current path of the electrical component (1, 101) between the at least two electrical connections (5a, 5b).

5. Electrical component according to one of claims 1 to 4, characterized in that the housing (2, 102) has two encapsulated housing sections (2a, 2b, 102a, 102b), of which a first housing section (2a, 102a) accommodates the pyrotechnic switching element (3) and the other second housing section (2b, 102b) accommodates the resistor (4).

6. Electrical component according to claim 5, characterized in thatthe second housing section (2b, 102b) has a longitudinal extension running essentially around the first housing section (2a, 102a), in particular a concentric one, or that the second housing section (2b, 102b) has a longitudinal extension running laterally away from the first housing section (2a, 102a).

7. Electrical component according to one of claims 1 to 6, characterized in thatthe pyrotechnic switching element (3) has a pyrotechnic charge (8), two current conductor sections (10a, 10b) arranged separated from one another by an intermediate space (9) in a current path of the electrical component (1, 101), and a bridging element (11) which, in an initial position (11a) before ignition of the pyrotechnic charge (8), is arranged separately from at least one of the two current conductor sections (10a, 10b) and, in a bridging position (11b) after ignition of the pyrotechnic charge (8), is in electrical contact with both current conductor sections (10a, 10b).

8. Electrical component according to one of claims 1 to 7, characterized in that the resistance element (6) absorbs a predetermined energy for discharging a capacitor of at least 0.1 kJ, in particular 0.5 kJ, for example of at least 1.0 kJ, without causing damage.

9. Electrical component according to one of claims 1 to 8, characterized in thatthe resistance element (6) forms a fusible part of the resistor (4) designed as a fuse.

10. Electrical component according to one of claims 1 to 9, characterized in that the resistance element (6) melts when a predetermined energy for discharging a capacitor is exceeded, at the latest when the predetermined energy is exceeded by 50% or when the predetermined energy is exceeded by 10 to 50%, in particular by 10 to 20%.

11. Electrical component according to one of claims 1 to 10, characterized in that the arc extinguishing agent (7) lies directly against the resistance element (6) and / or a sheath (M) made of the arc extinguishing agent (7) completely surrounding the resistance element (6) has a sheath thickness of at least 0.5 mm, in particular of at least 1 mm, radially outward from the resistance element (6).

12. Electrical component according to one of claims 1 to 11, characterized in thatthe arc extinguishing agent (7) surrounds at least 90%, in particular at least 95%, of the length (L) of the resistance element (6), in particular completely.

13. Electrical component according to one of claims 1 to 12, characterized in that the arc extinguishing agent (7) consists of sand, in particular quartz sand (SiO2), and / or that the resistance wire (6a, 106a) is a NiCr wire or has Cr and Ni as alloying elements.

14. Electrical component according to one of claims 1 to 13, characterized in that the resistor (4) has an electrical resistance of ≥ 0.1 ohm, in particular ≥ 5 ohm, more preferably ≥ 10 ohm, and / or that the electrical resistance of the resistor (4) is in the range from 0.1 to 400 ohms and / or that the resistor (4) has a nominal power P70 in the range from 1 to 250 watts, in particular in the range from 3 to 150 watts.

15. Electrical component according to one of claims 1 to 14, characterized in thatthe resistor (4) has a temperature coefficient (TCR) of ≥ 20 ppm / K, in particular ≥ 50 ppm / K, and / or that the resistor (4) has a temperature coefficient (TCR) of ≤ 2500 ppm / K, in particular ≤ 2000 ppm / K.

16. Circuit, in particular intermediate circuit, with an electrical component (1) according to one of claims 1 to 15, characterized in that the resistor (4) of the electrical component (1) forms a discharge resistor in the circuit (16).

17. Vehicle, in particular a land vehicle, motor vehicle, watercraft or aircraft, with a circuit (16) according to claim 16.

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