Metal Oxide Varistor Function

Surface mountable mov metal oxide varistor devices facilitate customs in smt assembly process and resolve the pcb space limitation issue.

Metal oxide varistor function.

Since a metal oxide is used in its construction the ability to absorb short voltage transients and the energy handling capabilities are extremely high. 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. Mov s are the most used component to protect heavy devices from transient voltages. When exposed to high transient voltage the mov clamps voltage to a safe level.

They are reflow and wave solderable and include the ch sm7 sm20 mle mhs ml and mln series. Metal oxide varistor is a voltage dependent resistor that is made with ceramic powders of metal oxides like zinc oxide and some of the other metal oxides like oxides of cobalt manganese bismuth etc. This type is commonly known as the metal oxide varistor mov. Essentially these voltage dependent nonlinear devices have.

Metal oxide varistors are the most commonly used components that are used as voltage clamping devices to protect small or heavy devices from transient voltage surges. Metal oxide varistors are now the most common type of voltage clamping device and are available for use at a wide range of voltages and currents. Varistors are used as control or compensation elements in circuits either to provide optimal operating conditions or to protect against excessive transient voltages. A metal oxide varistor mov is a protection component used in power supply circuits that is powered directly from ac mains.

Mov is the most commonly used type of varistor. The metal oxide varistor is designed to protect various types of electronic devices and semiconductor elements from switching and induced lightning surges. Metal oxide varistors consist of approximately 90 zinc oxide as a ceramic base material plus other filler materials for the formation of junctions between the zinc oxide grains. The ceramic powders of the metal oxides are kept intact between two metal plates called the electrodes.

A mov consist of approximately 90 of zinc oxide and a small amount of other metal oxides.