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Thyristor Trigger

The smallest stand-alone trigger in the world can fire the largest thyristor you would ever use!


  • Replaces pulse transformers and associated components
  • No gate drive power supply needed
  • A 12mA control signal is the only requirement
  • For line voltages from 100 - 2 500Vac
  • All modules have optically-isolated inputs (5KV, VDE0884)
  • Capable of triggering amplifying-gate thyristors
  • Units for triggering two thyristors for DC/AC control
  • Units for triggering one thyristor via fibre-optic cable
  • Will trigger under any load conditions
  • Connects directly to the outputs of microcontrollers, microprocessors, CPLDs and FPGAs.

Typical applications include:

Controlled rectifiers and DC drives, AC controllers, AC Drives, Softstarters, Zero-cross switching in heaters and welders, Power factor correction, high power Solid State Relays, Electrostatic precipitators, HVDC electricity transmission, in fact, WHEREVER a thyristor is used.

All components and parts used in these units have been certified by their manufacturers as RoHS Compliant
The Optocoupler is approved for UL1577 File No. E52744 System Code H or J, Double Protection and DIN EN 60747-5-2 (VDE0884), RoHS 2002/96/EC and WEEE (2002/96/EC)
No warranty is given for the accuracy of information stated by the respective manufacturers.

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BSR Controls CC - South Africa . P.O.Box 427 . Clanwilliam . South-Africa . 8135 . +27 27 482 2246