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TVS - Varistors, MOVs

The VC080503A100DP is a varistor with a thermally protected Metal Oxide Varistors (MOV) device. MOVs are often used to reduce overvoltage transients and provide protection to electrical components and circuits. This particular device has passive thermal protection, and is designed to protect against overvoltage transients from lightning, inductive loads, static electricity, and back-voltage from switching a transformer.

The VC080503A100DP is designed for high-power, high-speed applications in areas like circuit protection for radios, DVDs, navigation systems, laptop computers, and other consumer electronics. It has a variety of uses, such as providing overvoltage protection for power systems, suppressing high-frequency noise from digital circuitry, and protecting against the static electricity generated by motors.

Working Principle

The working principle of the VC080503A100DP is fairly simple. It consists of a graphite disc with several layers of metal oxide, which acts as a semiconductor. When exposed to a high voltage, a current will flow between the disc and other layers, allowing for a low resistance connection. This is known as a "breakover voltage," and it is what allows the MOV to provide protection against high voltage transients.

When the varistor is not exposed to a high voltage, it acts like an open circuit. However, when exposed to a very high voltage, the MOV will become conductive and will allow a path for current to flow from one side to the other. This phenomenon is known as "clamping," and it helps to reduce the voltage of the transient to a safe level.

The device also has passive thermal protection, which ensures that the MOV does not become too hot and cause damage to the components of the system. This is accomplished by using multiple layers of metal oxide, which are designed to absorb heat and dissipate it quickly, preventing the MOV from becoming too hot and damaging the system.

Applications

The VC080503A100DP can be used for a variety of applications, including overvoltage protection for power systems, suppression of high-frequency noise from digital circuitry, and protection from surges of static electricity generated by motors. It is also often used for circuit protection in radios, DVDs, navigation systems, laptop computers, and other consumer electronics.

MOVs are an important piece of equipment in any system that needs protection from high voltages. They are highly reliable and dependable, and they provide protection in a wide variety of situations. The VC080503A100DP is an excellent choice for applications needing protection from harmful overvoltage transients.

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