A unique Concept
One Active Trigger Unit (ATU) replaces pulse transformers and associated circuitry and may be directly connected to the outputs of microcontrollers, microprocessors, CPLDs and FPGAs. It triggers any size thyristor, including amplifying-gate devices, under all possible load conditions. The only requirement is a 12mA control signal and since it derives its power from the anode of the thyristor, no power supply is needed. As long as current flows into the control terminals of the ATU, the thyristor remains triggered. This is a useful feature when the thyristor is required to control highly inductive loads where it is recommended that a continuous pulse instead of a train of pulses is used. The gate of the thyristor is driven from a voltage source of 22V. This eliminates the need for very short gate leads, even in hostile environments. Twisted gate leads in the order of 1m can be used while maintaining a high rate of rise of gate current. The units are intended for mains voltages from 100 - 690Vrms and the high-voltage modules for 1 250 and 2 500Vrms.
Click on image of module to view PDF datasheet.