SKKT92-12E Dual Thyristor Module 1200V, 106A 150mA RS Stock No.: 905-6116 Mfr. Part No.: SKKT 92/12 E Brand: Semikron. A Thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act as bistable switches, conducting when their gate receives a current trigger, and continue to conduct while they are forward biased. Thyristors are synonymous to Silicon-Controlled Rectifier (SCR).