浪涌吸收元件

Surge-absorbing element

Abstract

This surge-absorbing element comprises a varistor substrate, a pair of electrodes that are electrically connected to the end faces of said varistor substrate and support the varistor substrate from both sides, exterior leads that are electrically connected to the respective electrodes, a packaging member that covers the electrodes, and a thermal-expansion body that is provided between the electrodes. Heat produced by the varistor substrate causes the thermal-expansion body to irreversibly expand so as to pull at least one of the electrodes away from the varistor substrate. The temperature at which the thermal-expansion body starts expanding is, for example, greater than or equal to 180 DEG C.
浪涌吸收元件具有:压敏电阻基体;一对电极,它们与所述压敏电阻基体的两端面电气地连接,将所述压敏电阻基体夹持;外部引线,其分别与所述一对电极电气地连接;外装部件,其将所述电极包覆;以及热膨胀体,其设置于所述一对电极之间,且会由于所述压敏电阻基体产生的热而不可逆地进行膨胀,将所述一对电极之中的至少一者从所述压敏电阻基体分离。所述热膨胀体开始进行膨胀的温度例如大于或等于180℃。

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