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 (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.

2019年12月9日 · A Metal Oxide Varistor or MOV is the blue or orange-colored circular component that you can commonly spot on the AC Input side of any Power Supply Circuit. The Metal Oxide Varistor can be considered as another type of variable resistor that can vary its resistance based on the applied voltage across it.

2017年9月18日 · This Varistor has two semiconductor elements, and provides over voltage protection in a circuit, similar to a Zener diode. So how does the change in applied voltage change its resistance? Well, the answer lies in its composition.

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.

2024年5月29日 · 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 with changes in voltage.

2020年8月21日 · A varistor is a device with a non-linear volt-ampere characteristic. It is mainly used to clamp the voltage when the circuit is subjected to overvoltage and absorb excess current to protect sensitive devices. It is also called "Voltage-Dependent Resistor" abbreviated as "VDR".

How to Build a Simple Varistor Circuit. In this project, we will show how to place a varistor in a circuit so that it can serve its purpose which is to protect electronics from excess voltage and current.

2023年7月25日 · 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.

2024年3月22日 · 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. When the voltage is low, a varistor has high resistance, which means it won’t affect the circuit much.