V385LU40BPX2855

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TVS - Varistors, MOVs - are widely used to protect electrical circuits from voltage transients. The V385LU40BPX2855 is just one of many components used for this purpose. This article will explain the application field and working principle of this device.

The V385LU40BPX2855 is a high-reliability varistor for transient overvoltage protection. It is designed to provide superior performance in applications such as automotive, communication systems, ICT, and critical infrastructure circuits. In particular, this device has been designed to meet stringent performance requirements of ISO 26262, which is a standard for the functional safety of electrical/electronic systems in automobiles.

The device is characterized by high efficiency, reliable operation, and robust construction. It features a high peak pulse current rating of up to 20 amperes and an operating voltage range of between -5 and +100 volts. Furthermore, the device is capable of suppressing transient voltage pulses with a 30-V/μs dv/dt rating. It is also highly effective in clamping voltage spikes up to 400 volts.

The working principle of the V385LU40BPX2855 can be summarized as follows. The device is a nonlinear resistance element with two terminals across which a voltage is applied. When in an unbiased state, the device functions as an open switch with no current flowing through it. However, when the applied voltage rises above a certain threshold level, the device switches on and begins to conduct current. The device then acts as a resistor, limiting the voltage to a safe level.

Once the initial overvoltage has been clamped, the voltage across the device will remain constant until the overvoltage is removed. Upon removal of the overvoltage, the device will then revert to its open state and provide further protection against any remaining transients. This is the essential working principle of the V385LU40BPX2855 and it is one of the features that make it so effective in protecting sensitive electrical circuits.

In conclusion, the V385LU40BPX2855 is an effective and high-reliability varistor for transient overvoltage protection. It is designed to provide superior performance in automotive, communication systems, ICT, and critical infrastructure circuits. It is characterized by high efficiency, reliable operation, and robust construction and it features a high peak pulse current rating of up to 20 amperes and an operating voltage range of between -5 and +100 volts. The device works by acting as an open switch until the voltage rises above a certain threshold, at which point the device switches on and begins to conduct current, limiting the voltage to a safe level.

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