Question: why snubber circuit is used in scr?
Answer: The main purpose of Snubber Circuit is to prevent the unwanted triggering of SCR or thyristor due to high rate of rise of voltage i.e. dv/dt. We already know that if the rate of rise of anode to cathode voltage of SCR is high then it may lead to false triggering. This is commonly known as dv/dt triggering.