Thermally protected varistor

Abstract

A thermally protected varistor includes a frame, a varistor, a slider, an elastic member, and a reed electrode. The slider is provided between the reed electrode and the varistor. The reed electrode is welded to an electrode of the varistor through a low-melting-point alloy. The elastic member is connected to the slider to drive the slider to abut against a connection position between the reed electrode and the varistor. A wrapper made of a heat-resisting material is provided outside the slider. In the thermally protected varistor, the slider connected to the elastic member is provided between the varistor and the reed electrode to achieve automatic disconnection in case of overvoltage, thereby effectively protecting electrical equipment. The wrapper made of the heat-resisting material is provided on the slider, so as to prevent the slider from melting and catching fire due to a high current passing through.

Dependencies are inferred from the claim text.