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Usually the forward voltage triggering method is not used to turn-on the SCR because

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in Power Electronics by (27.1k points)
Usually the forward voltage triggering method is not used to turn-on the SCR because

(a) it increases losses

(b) it causes noise production

(c) it may damage the junction & destroy the device

(d) relatively it’s an inefficient method

I had been asked this question in unit test.

My question is taken from Thyristors-2 in portion Power Electronics Devices of Power Electronics

1 Answer

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by (45.1k points)
Correct answer is (c) it may damage the junction & destroy the device

Explanation: In forward voltage triggering the middle junction breaks down without any gate signal and pushes the device into the conducting state. This method can permanently damage the J2 junction and make the device useless.

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