United Automation, BFTM-3, Thyristor Trigger Module, 97 x 94 x 73mm

Burst firing trigger module for driving both triacs & thyristors. Single & 3-phase versions available.

Zero voltage switching
Opto-isolated outputs
Voltage or manual potentiometer control
LED indication of output
Top hat or G profile DIN-rail mounting

The number of complete mains cycles during fixed repeating periods (typically 1 to 10 seconds) is varied, thus altering the duty cycle or on-/off-time ratio. Trigger pulses coincide with the zero-crossing times of the mains supply thus ensuring no RFI is produced when using resistive loads.