Thyristor

Welcome to the Thyristor!

Fundamental

A thyristor is a solid-state semiconductor device with four layers of alternating P- and N-type materials. It acts exclusively as a bistable switch, conducting when the gate receives a current trigger, and continuing to conduct until the voltage across the device is reversed biased, or until the voltage is removed (by some other means). Some sources define silicon-controlled rectifier (SCR) and thyristor as synonymous. Other sources define thyristors as more ornately constructed devices that incorporate at least four layers of alternating N-type and P-type substrate.


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