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Posted

hi friend!
snubber capacitors are used to protect expensive devices like thyristors against surge voltages which may appear across them in form of sudden spikes.
capacitor acts as short fo high frquency and current does not flow through the device initially but increases slowly as the cap is charged....
thats it

Posted

A snubber capacitor is used so that a fast-rising voltage doesn't cause the thyristor to turn-on. A thyristor has a dv/dt rate-of-voltage-rise rating that it can withstand without turning on. A snubber capacitor slows-down the voltage rate-of-voltage-rise.

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