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All about Electronics│What is a Thyristor?

All about Electronics│What is a Thyristor?

Submitted by • February 3, 2020

I Introduction

Thyristor is the abbreviation of thyratron transistor, which is also known as silicon controlled rectifier. In 1957, General Electric Company developed the world's first thyristor product, and in 1958 made it commercialized.

The structure of thyristor is a PNPN four-layer semiconductor structure, which has three poles: anode, cathode and gate pole. Its working conditions are: a forward voltage is added and there is a trigger current at the gate pole. Its derived devices include fast thyristor, bidirectional thyristor, reverse conducting thyristors, light-controlled thyristors, etc.

It is a high-power switching semiconductor device, which is represented by the letter symbols "V" and "VT" in the circuit. The thyristor has the characteristics of a silicon rectifier device, which can work under high voltage and high current conditions. As its working process can be controlled, it’s widely used in controllable rectification, AC voltage regulation, non-contact electronic...

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