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 limit to pass …

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 significantly …

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 …

Unlike the fuse or circuit breaker which offers over-current protection, the varistor provides over-voltage protection by means of voltage-clamping in a similar way to the zener diode.

About Varistors A varistor, also known as a Metal Oxide Varistor (MOV), is an electronic component with a variable resistance that changes with applied voltage. This nonlinear semiconductor device …

Protect circuits from electrical spikes and surges. You’ll often find these varistors in surge protectors for programmable logic controllers (PLCs) and sensors. Also known as voltage-dependent resistors …

Varistors are nonlinear two-element semiconductors that drop in resistance as voltage increases. Voltage dependent resistors are often used as surge suppressors for sensitive circuits. Here are …

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 …

May 22, 2026 · Just as thermistors the varistor is fabricated from a compressed and sintered powder compound that consists of silicon carbide (SiC) or zinc oxide (ZnO). The ZnO varistor has superior …