Surge protection device

US10109993B2 · kind B2 · utility

Assignee

• Dongguan Littelfuse Electronics Company Limited · CN

Inventors

• Wen Yang · Tangxia, CN
• Hailang Tang · Tangxia, CN
• Yanjing Xiao · Tangxia, CN

Key dates

• Filing date: Apr 7, 2015
• Grant date: Oct 23, 2018
• Expiry date: Apr 7, 2035

Classification

• Technology area (CPC —): General

Abstract

A circuit protection device includes a metal oxide varistor (MOV), a spring terminal and a thermal disconnect coupling the spring terminal to the MOV. A gas discharge tube (GDT) is coupled to the MOV. The spring terminal is biased such that upon occurrence of an overvoltage condition, heat generated by the MOV melts the thermal disconnect and allows the spring terminal to be displaced away from the MOV, thereby creating an opening circuit.