Discussion
dv/dt protection is provided to the SCR by :
Answer: C
dv/dt protection is given by connecting a capacitor and resistor in parallel with the device.
The junctions of an SCR have capacitance, and a rapidly rising anode voltage drives a charging current \(i = C\, dv/dt\) through them. That current can act like gate current and turn the SCR on falsely. An RC snubber across the SCR absorbs the fast voltage change, slowing the rise of voltage across the device; the resistor limits the capacitor's discharge current when the SCR turns on.
A series inductor protects against di/dt, not dv/dt, and a capacitor across the load or an inductor across the device does not slow the voltage across the SCR.
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