Metal Oxide Varistor Circuit

Metal oxide varistors or mov s are typically made from a small disk shaped metal zinc oxide material.

Metal oxide varistor circuit.

The circuit we will build is shown below. Metal oxide varistors movs are available in a variety of form factors and sizes for a broad range of applications. The most common type is the mov or metal oxide varistor. When a high current passes through a mov its resistance value decreases and acts as a short.

This mov circuit will clamp up to 300vac if a power surge allowing transients into the circuit were to be that high. Working of metal oxide varistor mov working of metal oxide varistor mov the working of a mov is shown in the figure above. They are composed primarily of z n o with small additions of other metal oxides such as bismuth cobalt magnese and others. A metal oxide varistor is frequently used in different circuits along with a fuse.

They are available in many values for specific voltage ranges. The metal oxide varistor or mov is. The main components used to protect the circuit are fuse and varistor. Metal oxide varistor circuit.

An mov s voltage rating called the varistor voltage is the voltage across a varistor when a current of 1ma is passed through the device. 300vac metal oxide varistor. The components needed to build this circuit are shown below. The radial leaded disc type is the most common version.

The circuit of the mov is shown below. The resistance of the mov is very high. Metal oxide varistors and multi layered varistors. The metal oxide varistor or mov is a voltage dependent nonlinear device that provides excellent transient voltage suppression.

The most common modern type of varistor is the metal oxide varistor mov. When the circuit is exposed to a high voltage transient the varistor starts to conduct and clamps the transient voltage to a safe level. The boundary between each grain and a neighbor forms a diode junction which allows. These two are connected in parallel to the protected circuit.

Varistors are voltage dependent nonlinear devices which have electrical characteristics similar to back to back zener diodes. 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. The energy of the incoming surge is partially conducted and partially absorbed protecting the circuit. First let us consider the component to have an open circuit as shown in figure 1 a.