A voltage-dependent resistor used for surge protection in electrical systems.
A Metal Oxide Varistor (MOV) is a semiconductor device with nonlinear voltage-current characteristics, primarily composed of zinc oxide and other metal oxides. It functions as a voltage-clamping component that protects sensitive electronic equipment from voltage spikes and transient surges by rapidly changing its resistance when the voltage exceeds a specific threshold.
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MOVs have a finite lifespan dependent on surge exposure. They can withstand multiple small surges but may degrade after absorbing large energy transients, typically requiring replacement after significant events.
MOVs handle higher energy surges but have slower response times and higher clamping voltages compared to TVS diodes, which offer faster response and lower clamping voltages for precision protection.
Yes, MOVs are suitable for both AC and DC applications, with voltage ratings specified accordingly for each type of circuit.
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