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Resistors and Potentiometers
Varistors - VDR
RSRSVA
A varistor is an electronic device that varies its electrical resistance as a function of the voltage applied to its ends.
Initially, its resistance is very high, therefore, for voltages below the nominal, it behaves practically like an open switch. When it is subjected to a voltage greater than the nominal one, its resistance drops drastically until it behaves like a closed switch.
Varistors protect circuits from being damaged by overvoltage, since all the current in the circuit will pass through the varistor, preventing it from passing through the rest of the components.
20Epcos2Panasonic1Semikron Danfoss2
10 A825 A340 A250 A7100 A3190 A2
10 mm Disc214 mm Disc620 mm Disc440 mm Disc35 mm Disc17 mm Disc7Semipack2
