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] It has a nonlinear , non- ohmic current–voltage characteristic that is similar to that of a diode .

Varistors are semiconductor devices designed primarily to protect electronic circuits from voltage spikes and transients. The most widely used type is the Metal Oxide Varistor (MOV), typically composed of zinc oxide (ZnO) grains separated by grain boundaries that create semiconductor junctions (Nahm, 2020).

Sep 18, 2017 · A Varistor is a varying resistor whose resistance depends on the applied voltage. The name has been coined by linguistic blend of words; “varying” and “resistor”. They are also known by the name VDR [voltage dependent resistor] and have non-ohmic characteristics. Therefore, they come under non linear type of resistors.

May 29, 2024 · A varistor is an electronic component that protects electrical circuits against overvoltage. Because its electrical resistance varies with applied voltage, it is commonly referred to as a voltage -dependent resistor (VDR).

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 some examples of different varistor packages. The block packages are used for …

The Varistor is a passive two-terminal solid state semiconductor device that is used to provide protection to electrical and electronic circuits. 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.

A varistor is a 2 terminal semiconductor device that protects the electrical and electronic devices from overvoltage transients. The resistance of a varistor is dependent on the applied input voltage.

Mar 22, 2024 · It is a passive non linear two terminal solid state semiconductor device. A Varistor, or Voltage Dependent Resistor (VDR), is a type of resistor whose resistance changes with the voltage applied across it. It’s used to protect circuits against high voltage spikes.

Jul 25, 2023 · What is a varistor? A varistor is a resistive device with non-linear voltammetric characteristics, mainly used for voltage clamping when a circuit is subjected to overvoltage, absorbing excess current to protect sensitive devices.

Mar 1, 2025 · What is a Varistor? Varistors are voltage-dependent resistors that protect electronic devices from voltage surges. When excess voltage is detected, varistor quickly alters its resistance to divert the voltage, safeguarding sensitive components.