On Metal Oxide Varistor?

The Metal Oxide Varistor or MOV is a voltage dependent, nonlinear device that provides excellent transient voltage suppression. The Metal Oxide Varistor is designed to protect various types of electronic devices and semiconductor elements from switching and induced lightning surges.

What is a Metal Oxide Varistor used for?

This type is commonly known as the metal-oxide varistor (MOV). Varistors are used as control or compensation elements in circuits either to provide optimal operating conditions or to protect against excessive transient voltages.

How does Metal Oxide Varistor work?

Working Principle

The term MOV or Metal Oxide Varistor is a variable resistor. But not like a potentiometer, its resistance will change automatically depending on its voltage. Once the voltage across the varistor increases, the resistance will be decreased.