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Construction of a Metal Oxide Varistor

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Added on  2020-02-05

Construction of a Metal Oxide Varistor

   Added on 2020-02-05

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Running Head: Electronic Fundamentals 1Electronic FundamentalsStudent’s NameProfessor’s NameDate
Construction of a Metal Oxide Varistor_1
Electronic Fundamentals 2Metal Oxide VaristorIntroductionA Varistor is a current-voltage characteristic component which has consisted of two terminals; it is a solid state semiconductor with similar properties to a diode. It serves the purpose of protecting electronic and electrical circuits from high voltages (Levinson, 1975). However, unlike a circuit breaker or a fuse, it offers protection from high currents by shorting when an overcurrent is registered and thus protecting the device from the surge in current.Construction of a Metal Oxide Varistor.
Construction of a Metal Oxide Varistor_2
Electronic Fundamentals 3A Metal Oxide Varistor (MOV) is the most common Varistor used. The components of a metal oxide Varistor is mainly from the adding up of metal oxides such as manganese, cobalt, and other metals applicable which are kept in between electrodes and an inclusion of the main component which is Zinc Oxide. The body of a metal oxide Varistor consist of a semiconductor material characteristic of current and voltage symmetry which are non-ohmic this makes it applicable in both DC and AC voltages. A metal oxide Varistor is thus a large number of parallelconnected diodes in order to enable the ability to handle large amounts of energy, but for a betterrating of voltage, the diodes are connected in series.Metal Oxide Varistor have a wide range of voltages, the Varistor voltages are between 10volts to 1000 volts and above for the selection of DC or AC and help to identify the voltage supply. In selecting an MOV or any Varistor for a given device it's maximum rating of voltage should be above the highest voltage supply expected, that means for a 240 supply voltage the MOV should have a 270-volt RMS. The maximum current surge value that a Varistor takes depends on the number of times a pulse is repeated and the width of the transient pulse. Operation An MOV has a very high resistance. The component of a device containing an MOV is asshown above. The conduction of the component is as soon as its voltage reaches the minimum voltage required to conduct electrons from the valence band to the conduction band which is
Construction of a Metal Oxide Varistor_3

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