ROV20H821K

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The ROV20h821K is an angularly-triggered, thyristor-backed metal oxide varistor (MOV) device that is used as overvoltage protection in circuits. It is designed to protect circuits from both based static discharge (ESD) as well as transients from power surges. The ROV20h821K is manufactured by Eaton Corporation and is part of the zeroONI MOV family.

The ROV20h821K is a metal oxide varistor (MOV) and has a 14 pin single inline package (SIP). It is rated for voltage up to 20kV. Its operating temperature range is -40ºC to +85ºC. The MOV thickness is 1.2mm, which is typical for MOVs. It has an insulation resistance of 5MΩ and a dielectric strength of 4KV.

The ROV20h821K application field includes telecommunications systems, solar energy systems, power supplies, surge protection, and consumer electronics. As a MOV, it is used to detect voltage levels and absorb excess energy during transients. It can also clamp a decaying surge and protect the underlying circuitry. It is a self-resetting device, meaning it will reset itself after a surge is absorbed.

The working principle of the ROV20h821K is relatively simple. During normal operation, the MOV does not conduct electricity as the applied voltage is below its rated voltage. However, when the applied voltage exceeds the MOV’s rated voltage, the MOV increases its conduction level and absorbs the excess energy, thus preventing damage to the underlying circuitry. The MOV can then reset itself after the event and is ready to absorb the next surge.

When used properly, the ROV20h821K is an effective solution for transient protection in many different applications. It is designed to be reliable and robust, with an operating temperature range of -40ºC to +85ºC and an insulation resistance of 5MΩ. It is a key component in any circuit which is susceptible to transient or ESD events, and can prove an invaluable tool in the protection of sensitive components.

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