What Is Scr in Electronics?

A silicon controlled rectifier or semiconductor controlled rectifier is a four-layer solid-state current-controlling device. ... SCRs are unidirectional devices (i.e. can conduct current only in one direction) as opposed to TRIACs, which are bidirectional (i.e. charge carriers can flow through them in either direction).

What is SCR and how it works?

Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. ... It is called "selective" because it reduces levels of NOx using ammonia as a reductant within a catalyst system.

What does a SCR do in a circuit?

An SCR, or Silicon Controlled Rectifier, is a semiconductor, or integrated circuit (IC), that allows the control of current using a small current. Basically, it is a simple direct current (DC) light switch.