Why Varistor Is Used? MOV, Varistor and VDR Explained

Why Varistor Is Used?

A varistor (voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. Varistors are used to protect a circuit from high voltage surges. When a high voltage surge is applied to a circuit, the outcome is usually catastrophic to the circuit.

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Timestamp
00:00​ - Over Voltage
00: 23​ - Varistor Working
03:24​ - Connection of Varistor

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