Metal Oxide Varistor Mov

Metal oxide varistor basics mov is the most commonly used type of varistor.

Metal oxide varistor mov.

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. Special medium voltage varistors mov square disk 5 7 10 14 20 23 60 500 v 60 550 v 600 15 000 a 25 ns. The most common modern type of varistor is the metal oxide varistor mov. Metal oxide varistors are similar to resistors and has only two leads.

When a high current passes through a mov its resistance value decreases and acts as a short. The boundary between each grain and a neighbor forms a diode junction which allows. There is no polarity for these leads and hence can be connected in both directions. A metal oxide varistor mov is a protection component used in power supply circuits that is powered directly from ac mains it is used to protect the circuit from high voltage spikes by varying its resistance.

Bourns mov metal oxide varistors movs protect against overvoltage transients such as lightning power contact and power induction. The metal oxide varistor is designed to protect various types of electronic devices and semiconductor elements from switching and induced lightning surges. It is called so as the component is made from a mixture of zinc oxide and other metal oxides like cobalt manganese and so on and is kept intact between two electrodes which are basically metal plates. 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.