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Identify the “false” statement: a) A high di/dt results in local overheating and damage in a thyristor. b) A thyristor may turn ON even without a gate signal due to large forward voltage. c) To turn OFF a thyristor the anode current must be brought below the latching current of the device. d) A thyristor may turn on without any control signal if dv/dt value is exceeded.

Question

Identify the “false” statement: a) A high di/dt results in local overheating and damage in a thyristor. b) A thyristor may turn ON even without a gate signal due to large forward voltage. c) To turn OFF a thyristor the anode current must be brought below the latching current of the device. d) A thyristor may turn on without any control signal if dv/dt value is exceeded.

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Solution

The false statement is: b) A thyristor may turn ON even without a gate signal due to large forward voltage.

This is false because a thyristor requires a gate signal to turn on. Even with a large forward voltage, the thyristor will not turn on without a gate signal.

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