The current control range of an SCR is:

Question

Question

This question was previously asked in

PGCIL DT Electrical 12 March 2022 (NR II) Official Paper

Answer 1

The correct answer is option 4):(30 - 100 A)

Concept:

A SCR is made of semiconductor which is very much thermal sensitive.
Even due to short time over current, the temperature of the device may rise to such a high value that it may cross its maximum allowable limit.
Hence there will be a high chance of permanent destruction of the device.
For this reason, current rating of SCR is very essential part to protect the SCR.
The usual current rating of SCRs is from about 30 A to 100 A. In case the current exceeds the forward current rating, the SCR may get damaged due to intensive heating at the junctions.