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……