IGNITION PREVENTION OF ELECTRONIC ELEMENT THROUGH USE OF THERMOCONTRACTIVE INSULATING TUBE

摘要

Disclosed is an electronic part having a safeguard function for protecting the associated electronic equipment against abnormally high voltages such as lightning surge voltage. It is equipped with an element which cuts off any continuous excess current so as to prevent the surge absorbing element and the protected circuit from being spontaneously ignited. This electronic part having a safeguard function comprises: a surge absorbing element; a low-melting-point metal element which is electrically connected in series with said surge absorbing element and which is held in contact with said surge absorbing element in such a manner as to allow a satisfactory heat conduction therebetween; and a thermocontractive insulating tube which covers over the periphery of said surge absorbing element and the periphery of said low-melting-point metal element.