AN303晶闸管和双向晶闸管：当前锁定

AN303晶闸管和双向晶闸管：当前锁定

AN303
Application note

Thyristors and TRIACs: latching current

Introduction
The purpose of this note is to familiarize TRIAC or thyristor (SCR) users with the latching
current IL.
The importance of this parameter is illustrated with some typical examples. Procedures are
given for measurement of IL. The variation of IL with operating conditions and device
sensitivity are described.
This application note presents only the TRIAC case. However, the concepts are valid for
SCRs (except for the var