Thyristors, TRIACs & DIACs | AC Switches for Power Control

This category includes advanced semiconductors for AC applications. A thyristor (SCR) is a unidirectional switch that stays on once triggered until current falls under holding threshold. A TRIAC is a three-terminal semiconductor that can conduct in both AC directions when triggered. A DIAC is a bidirectional, uncontrolled trigger diode without a gate, commonly used to fire TRIACs.