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Ceramic resistor

A technology of ceramic resistors and ceramics, applied in the direction of resistors, resistor assemblies, resistor components, etc., can solve problems such as short circuit of wiring patterns, fire of resin components, etc., and achieve the effect of ensuring safety and reducing costs

Active Publication Date: 2014-06-04
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the resistor body is broken, the temperature will not rise even if the power supply is cut off, but in the red hot state or molten state until the resistor body breaks after abnormal heating, the resin component of the printed circuit board on which the ceramic resistor is mounted ignites, and there is Danger of short-circuiting the wiring pattern due to it

Method used

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  • Ceramic resistor
  • Ceramic resistor
  • Ceramic resistor

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, use Figure 1 ~ Figure 4 A ceramic resistor according to a first embodiment of the present invention will be described.

[0027] Such as figure 1 as well as figure 2 As shown, the ceramic resistor 11 of the first embodiment of the present invention mainly includes: a cylindrical resistor body 1; a pair of electrodes 2 embedded in the two ends of the length direction of the resistor body 1; A conductive metal film 3 on a part of the outer peripheral surface of the resistor 1 ; and lead terminals 4 protruding outward from the pair of electrodes 2 . The ceramic resistor 11 is mounted on a printed circuit board (not shown), and the electrodes 2 are soldered to through holes of the printed circuit board.

[0028] The structure of the ceramic resistor 11 will be described in detail. The resistor body 1 is made of insulating ceramics mixed with SnO 2 It is sintered ...

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Abstract

Provided is a ceramic resistor that is capable of immediately shutting power off in the event of generation of abnormal heat in the resistor without requiring a thermal fuse to be added. The ceramic resistor (11) is provided with: a resistor body (1) which is created by means of sintering of a mixture of a conductive material and insulating ceramics; a pair of electrodes (2) which are fitted to either end of the resistor body (1) in the length direction; and lead terminals (4) which protrude outward from the respective electrodes (2). A conductive metal film (3) having a lower resistivity than that of the resistor body (1) is provided along the entire circumference of the outer peripheral surface of the resistor body (1) in a partial region away from the electrodes (2).

Description

technical field [0001] The present invention relates to a ceramic resistor using a columnar resistor formed by mixing and sintering a conductive substance in insulating ceramics. Background technique [0002] Since the columnar resistors used in ceramic resistors are made of SnO 2 It is a solid resistor made by mixing conductive substances such as talc, Ca compounds, Ba compounds, and other insulating ceramics and sintering at a high temperature above 1000°C. Therefore, its surge characteristics are generally excellent (for example, refer to Patent Document 1). In addition, since such ceramic resistors can be used at high temperatures compared to thin film resistors, and have advantages such as chemical resistance, weather resistance, and difficulty in disconnection, they are suitable for use in high-voltage circuits or power circuits. Resistor. [0003] However, as we all know, if the resistor body using ceramic resistors is abnormally heated due to overload, it will beco...

Claims

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Application Information

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IPC IPC(8): H01C1/148H01C7/00
CPCH01C7/001H01C1/148
Inventor 平泽浩一伯耆原茂小松英幸有贺善纪大泽亮
Owner KAO CORP
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