A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2]

Nov 27, 2025 · Varistors are composed of semiconductor elements that provide overvoltage protection in a circuit. Their functionality is similar to a Zener diode, allowing voltages below the …

Aug 21, 2020 · The most common varistor is a metal oxide varistor (MOV), which contains a ceramic block composed of zinc oxide particles and a small number of other metal oxides or polymers, …

Jul 23, 2025 · A Varistor is an electronic component designed to protect electrical circuits from excessive voltage surges or transients. It is a nonlinear resistor whose electrical resistance varies …

Aug 15, 2025 · A varistor is a device with a nonlinear voltage-current characteristic. It is primarily used to clamp voltage when a circuit is subjected to overvoltage, absorb excess current, and protect …

What is a Varistor? A varistor is an electrical component that protects circuits from sudden voltage surges. The word comes from “voltage-dependent resistor,” which describes how it works: its …

Nov 8, 2025 · The solution to mitigating transient voltage spikes is a component known as a varistor, which is an acronym for variable resistor. This device is a non-linear, voltage-dependent resistor …

Varistors provide reliable and economical protection against high voltage transients and surges which may be produced, for example, by lightning, switching or electrical noise on AC or DC power lines.

Jun 13, 2025 · A varistor is a special type of resistor that changes its resistance depending on the voltage applied across it. When the voltage stays within normal limits, the varistor acts like an …

1 day ago · A Varistor is a voltage-dependent, non-linear resistor whose resistance changes significantly with applied voltage. The term varistor is derived from “variable resistor”, but unlike …