AVRL161A1R1NTB Circuit Protection

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TVS - Varistors,MOVs (transient voltage suppressors) are a type of voltage shifter with variable resistance that provides a measure of protection for important electrical equipment and circuits against voltage spikes or surges. The AVRL161A1R1NTB is an example of these devices. This article will explain the application field and working principle of this device.

Application field

AVRL161A1R1NTB is designed for IEC/EN61000-4-5 surge protection and meets the requirements of Overvoltage Category I (OVC I). It is suitable for applications that require high peak current, wide dynamic range and extremely fast response time. It has been specifically designed for shielding against ESD (electrostatic discharge) and TEMPEST (transient electromagnetic pulse) events. It also effectively suppresses surges in computer, com-sats, communications equipment, power systems, lighting, and audio/video systems. The device has high peak clamping voltage, wide dynamic range, fast response time and suitable for high current and high energy applications.

Working Principle

AVRL161A1R1NTB is a semiconductor device that responds to excessive or voltage surges by rapidly conducting the excess current away from delicate components or circuitry. It works by having two opposing leads (‘anode’ and ‘cathode’) which conduct current through the device when excessive current is experienced. The conductivity of the device is determined by the V-I curve, which shows how current responds to various different levels of applied voltage.Under normal voltage, current is conducted through the device at a low rate which is determined by the V-I curve. When the voltage touches the device’s threshold level, current is increased to a high rate. This causes an increase in the temperature of the device, which in turn creates a rapid decrease in the resistance of the device. This results in a surge in current which is quickly conducted away from the affected circuitry, thus protecting the device from damage.The device can also be used to provide filtering of signal noise caused by high frequency electronics. When it experiences a rapid rise in voltage, it responds by breaking up the rapid roll of the frequency causing the noise. This allows the device to act as a filter to reduce or even eliminate the signal noise.

Conclusion

The AVRL161A1R1NTB is a versatile voltage shifter which provides a measure of protection for sensitive components or circuits. It is easy to use and quick to respond to excessive voltage spikes, providing effective protection against ESD and TEMPEST events. Its peak clamping voltage, wide dynamic range, and fast response time make it suitable for a broad range of components and applications. It is also able to filter signal noise effectively, making it a very attractive option for many different types of devices and equipment.

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