Triggering

This is most easy and useful method to turn ON SCR. While designing the gate circuit following points must be considered: Appropriate gate to cathode voltage must be applied when SCR is forward biased. Gate signal should be removed after SCR is turned ON. When SCR is reversed biased, no gate signal should be applied. When SCR is in the OFF state, negative voltage should be applied between the gate and cathode. Also SCR can be triggered by applying DC gate signal or AC gate signal. Also by Pulsed gate signal that is a pulsated waveform is applied to gate, SCR can be triggered.