VDRH20X275BSE

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TVS - Varistors, MOVs are an important form of protective components used in electronic circuits to limit transient voltages that may otherwise cause damage to equipment. The purpose of this article is to provide an overview of the VDRH20X275BSE metal oxide varistor (MOV) device and its primary application field and describe its basic working principle.

A metal oxide varistor (MOV) is an electronic component that provides voltage regulation and transient overvoltage protection in a circuit. In normal operation, the MOV acts as an open circuit, allowing current to flow freely through it. However, when a voltage spike occurs, the MOV clamps the voltage level at a safe level to prevent an overvoltage situation. The MOV is a nonlinear resistor that has a very high, nonlinear current-voltage characteristic.

The VDRH20X275BSE metal oxide varistor is a Bidirectional Varistor designed to protect electronic systems from electromagnetic disturbances caused by lightning and power grid disturbances. It offers a high and reliable protection against high voltage transients. This MOV is a bi-directional voltage-dependent device with very low let-through energy. It is available in a variety of package sizes and ratings to meet various circuit-design requirements.

VDRH20X275BSE MOVs have a metal oxide semiconductor core which contains zinc oxide granules. This makes it stronger and able to withstand higher transients than ordinary MOVs. This MOV has a nonlinear, symmetrical response to transients, which means it has a positive voltage-dependent characteristic with a reverse voltage buildup that is equivalent to the forward voltage buildup. The clamping voltage rating of the VDRH20X275BSE MOV is 275V.

The working principle behind VDRH20X275BSE MOVs is based on the property of its epitaxial layer formed of zinc oxide granules. When a voltage spike occurs, the electrons in the MOV are excited and move into the epitaxial layer, where they redistribute themselves evenly across its surface. This creates an electrical field that is strong enough to clamp the voltage at a safe level, thereby preventing an overvoltage situation.

VDRH20X275BSE MOVs are designed to be used in a wide variety of applications including automotive, industrial, consumer electronics, telecommunications, medical and computer circuits. They can be used in power supplies, LED lighting, automotive electronics, appliance controllers, HVAC systems, power line converters and UPS systems. They are also commonly used in circuits that require robust protection against overvoltage transients.

In conclusion, VDRH20X275BSE is a versatile metal oxide varistor (MOV) device designed to provide voltage regulation and protection against transient overvoltages. It features a high clamping voltage rating for reliable protection in demanding applications. The MOVs have a zinc oxide granule-filled epitaxial layer that redistributes electrons upon the occurrence of a voltage spike, creating an electrical field that clamps the voltage at a safe level. This MOV can be used in a wide variety of applications, from automotive circuit protection to LED lighting.

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