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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
Epoxy filler is RoHS Compliant (2011/65/EU) and UL Approval meets UL94 V-0
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