This paper introduces the internal construction, principle and characteristic of auto - instauration fuse, and then discusses the application of the fuse in the electric power, computer and telecommunication equipments.

• 本文首先介绍聚合开关自恢复熔丝的内部结构、工作原理、主要特性和参数, 然后阐述其选用方法以及在电力电子设备、计算机及电信设备中的应用实例。