Vishay VS-VSKT500-16PbF, Thyristor 1600V, 500A 3A

Thyristor/Thyristor configuration
3500V_RMS isolating voltage from the metal base
Industrial standard package MAGN-A-PAK

UL approved file E78996

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Thyristors - Vishay Semiconductor

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).
Encapsulated modules with electrically isolated base plate. Suitable for applications such as battery chargers, welders and plating equipment, regulated power supplies and temperature and speed control circuits.