Gate Specifications of a thyristor
Gate Specifications of a Thyristor:
The various Gate specifications of a thyristor are given as:
Gate current to trigger (IGT):
Minimum value of the gate current below which reliable turn on of the thyristor cannot be guaranteed. Usually specified at a given forward break over voltage.
Gate voltage to trigger (VGT):
Minimum value of the gate cathode forward voltage below which reliable turn on of the thyristor cannot be guaranteed. It is specified at the same break over voltage as IGT.
Non triggering gate voltage (VGNT):
Maximum value of the gate-cathode voltage below which the thyristor can be guaranteed to remain OFF. All spurious noise voltage in the gate drive circuit must be below this level.
Peak reverse gate voltage (VGRM):
Maximum reverse voltage that can appear between the gate and the cathode terminals without damaging the junction.
Average Gate Power dissipation (PGAR):
Average power dissipated in the gate-cathode junction should not exceed this value for gate current pulses wider than 100 μs.
Peak forward gate current (IGRM):
The forward gate current should not exceed this limit even on instantaneous basis.