In an SCR, the latching current is __________ the holding current

Question

Question

This question was previously asked in

VSSC (ISRO) Technician B: Electronic Mechanic Previous Year Paper (Held on 10 Dec 2017)

Answer 1

The I-V characteristics of the thyristor are shown below.

F1 U.B Madhu 08.04.20 D7

From the above characteristics:

The thyristor will trigger when the applied voltage is more than the forward break over voltage
The latching current is always greater than the holding current
When reverse biased, a small leakage current will flow
SCR can be triggered without gate current by forward voltage triggering, dv/dt triggering, thermal triggering, and light triggering.