Metal Oxide Varistor Circuit Diagram

Metal oxide varistor mov basics of varistor.

Metal oxide varistor circuit diagram.

A varistor voltage dependent resistor vdr is a component which has a voltage current characteristics that is very much similar to that of a diode. The boundary between each grain and a neighbor forms a diode junction which allows. The circuit we will build is shown below. The resistance of the mov is very high.

The components needed to build this circuit are shown below. This mov circuit will clamp up to 300vac if a power surge allowing transients into the circuit were to be that high. This component is used to protect electrical devices from high transient voltages. The metal oxide varistor or mov is a voltage dependent nonlinear device that provides excellent transient voltage suppression.

The metal oxide varistor is designed to protect various types of electronic devices and semiconductor elements from switching and induced lightning surges. The most common modern type of varistor is the metal oxide varistor mov. The component starts conducting as soon as the voltage across it reaches the threshold voltage. This type contains a ceramic mass of zinc oxide grains in a matrix of other metal oxides such as small amounts of bismuth cobalt manganese oxides sandwiched between two metal plates which constitute the electrodes of the device.

300vac metal oxide varistor. First let us consider the component to have an open circuit as shown in figure 1 a.