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Semiconductors & Devices

Thyristor ModulesThyristor Modules


The thyristor module turns on by applying a pulse current to a gate current.

However, because it is a latch type semiconductor, the thyristor only turns on when a sustained current (holding current) reaches a set level.

To turn off in a DC circuit, the gate current must be reduced below the holding current or reverse voltage has to be applied using a commutation circuit. In an AC circuit, the pulse current has to be applied to the gate current whenever it is positive, because the gate current falls below the holding current and the thyristor turns off whenever the current alternates.

Main Applications

Welding machines/DC motor control, AC motor control/NC control/static switches/electric furnace temperature control/dimming of lighting


  • Various connection modules available
  • Lineup includes 400-1600V/20-400A
  • Complies with the RoHS directive


Image of connection

Data Sheets

View data sheets for Thyristor Modules