V385LT20APX2855

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TVS (Transient Voltage Suppressor) and MOV (Metal-Oxide Varistor), also known as Surge Arrestors, are electronic components placed in circuits to protect against voltage surge and voltage spikes. They are especially useful in the analysis of low-voltage circuits, which require lower levels of overvoltage protection than their higher-voltage counterparts.

In this article, we’ll discuss the V385LT20APX2855, a TVS and MOV device specially designed for low-voltage protection applications. We’ll cover its application field and working principle in detail.

Application Field

The V385LT20APX2855 is a key element in low-voltage system protection. Specifically, it’s used in applications where AC mains voltage occasionally exceeds the limits of the system, such as in communications networks or HVAC systems. It’s also used to protect from lightning-induced transients, which could otherwise cause severe system damage.

In the V385LT20APX2855, a rugged polymeric design provides superior protection and high-temperature applications in high-risk industrial and automotive environs. It can handle 0.5kA/8/20us and 1kA/8/20us of transient current at high efficiency, maintaining its performance characteristics throughout a wide temperature range.

Working Principle

The V385LT20APX2855 works on the principle of “Clamping”. In this mechanism, the device absorbs a preset level of excess voltage and “short-circuits” the current, limiting the magnitude of excess voltage present in the circuit. This prevents permanent system damage, as voltage transients are quickly discharged and current levels remain within the required specifications.

The V385LT20APX2855 is a Varistor-MOV Hybrid. Varistor MOVs are essentially combinations of Metal Oxide Varistors (MOVs), which let a controlled amount of current pass through them, and Zener Diodes, which turn the current into a short circuit when the voltage level of the system exceeds a predetermined level. In other words, the V385LT20APX2855 is designed to be a low-cost, low-power, and reliable overvoltage protection solution.

The V385LT20APX2855 consists of two separate, separate components: a varistor and an MOV. The varistor is an AC line filter that protects against small transients. It’s characterized by its dissipation factor and can be easily replaced should it degrade over time. The MOV is a three-leg component designed to protect against large transient voltages. It acts as a capacitive current-limiting device; should an overvoltage condition occur, the MOV is designed to absorb the excess energy and quickly dissipate it.

In summary, the V385LT20APX2855 is a robust low-voltage protection device designed for resistance to large transients and performance in high-temperature applications. Its varistor MOV hybrid design provides superior protection against overvoltage conditions at a lower cost and reduced power consumption.

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