V82MT3B Circuit Protection

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TVS (Transient Voltage Suppressors), MOVs (Metal-Oxide Varistors ), and other transient suppressor devices are used for protection of sensitive electronic components against transient voltages. The V82MT3B is a Metal-Oxide Varistor from the Vishay Intertechnology portfolio. This device is widely used in lighting systems, power supplies, automotive electronics, telecom equipment, and many other applications where transient voltage suppression is needed. This article will discuss the application field and working principle of the V82MT3B.

The V82MT3B is ideal for applications peaking at 8.2V, and it can handle peak currents up to 40A. The device is a multi-layer varistor (MLV) with a very low capacitance which is beneficial for high-speed data lines. Its construction consists of two metal-oxide layers with a vinyl or polyvinyl chloride (PVC) coating. The device is encased in a UL94-V0 rated plastic case, providing superior protection against environmental conditions, and an optional coating is available for additional reliability.

The working principle of the V82MT3B is relatively simple. When a high transient voltage is applied to its terminals, the voltage/current characteristics of the metal-oxide layers will change, allowing the current to pass through the device and thus protect the equipment downstream. As the transient voltage levels decrease, the V82MT3B will revert to its original state and return to its low capacitance values.

The V82MT3B has a wide range of applications in lighting design, power supplies, automotive electronics, telecom equipment, and various other fields. In lighting systems, the device is used to protect sensitive electronics against high transient voltage levels during motor start-up, short-term current surges, and lightning strikes. In power supplies, it can be used to protect against sudden power drop and electrical noise. In automotive electronics, the device is used to provide additional voltage suppression for critical components such as microcontrollers and other onboard devices. In telecom equipment, it is used to protect against high voltage transients due to lightning strikes and power surges.

In short, the Vishay V82MT3B Metal-Oxide Varistor is designed to protect against high transient voltages in a wide range of applications and environments. Its multi-layer construction and low capacitance make it ideal for high-speed data lines, and its optional coating adds an extra layer of protection against harsh environmental conditions. Its abilities also make it an excellent choice for applications in lighting, automotive electronics, power supplies, and telecom equipment.

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