ERZ-E07B621CS

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Introduction:

ERZ-E07B621CS is a varistor, also known as Metal Oxide Varistor (MOV). MOVs are a voltage dependent, nonlinear device, which is used to protect electrical circuits against over voltages. They are also known as transorbs, surge protection devices, or by the generic term suppression components. The ERZ-E07B621CS is designed to protect high power circuits from transients and surges.

Application Field:

The ERZ-E07B621CS is designed for use in high power applications, such as automotive and industrial power supplies, battery chargers, and motor control systems. It is also suitable for use in consumer electronics, internet of things (IoT) applications, and aerospace/defense systems.

The ERZ-E07B621CS varistor is also well-suited for use in uninterruptible power supplies, telecom circuits, and telecommunication towers, as well as being useful for protecting power supplies, drives, and generators. The device can also be used for various lightning strike protection applications.

Working Principle:

The ERZ-E07B621CS varistor works by clamping or “clipping” transients and surges to an acceptable level before they can damage the device connected to the varistor. The device achieves this by dissipating the energy contained in the voltage and current transients using a simple yet effective principle known as "avalanche breakdown". This is essentially a process of breaking down the oxide layer that covers the device’s p-n junction. The oxide is the material that prevents an electrical current from passing through normally, so when the voltage across the junctions exceeds a certain level, the oxide breaks down and an avalanche of electrons is created which allow the device to handle higher voltages and currents while still dissipating excess energy.

The ERZ-E07B621CS is also equipped with a thermal cut-off switch which opens if the temperature inside the device reaches a certain level. This is to protect against overheating, as the MOV’s internal capacitance and resistance increase when temperature rises, and can cause the device to fail if it is not provided with adequate heat dissipation.

Conclusion:

The ERZ-E07B621CS is a highly versatile voltage dependent MOV designed for high power applications such as automotive and industrial power supplies, battery chargers, and motor control systems. The device uses the principle of avalanche breakdown to protect against transient and surge voltages, and also features a thermal cut-off switch to prevent overheating. This makes the ERZ-E07B621CS a dependable and reliable choice for a wide range of electronic and electrical circuits.

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