SA160A Circuit Protection

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SA160A Application Field and Working Principle

SA160A Transient Voltage Suppressor Diode (TVS) is a type of surge-protection device designed to protect sensitive electronic equipment from damage caused by voltage transients resulting from lightning, electrical motor switching or other transcients. It is typically used in the electrical and electronic systems of vehicles, medical equipment, personal computers, and telecommunications systems. It can also be used to protect the equipment from overvoltage damage due to electrostatic discharges and line surges.

Overview

The SA160A is an advanced silicon diode designed to provide high surge immunity with very low power losses. It is designed to withstand repeat voltages up to 6.7kV, making it suitable for a wide range of surge protection applications. It is housed in a small package, making it one of the smallest TVS diodes available. This diode has low reverse leakage current for high reliability and multiple mounting options.

Applications

The SA160A is suitable for high-end applications including industrial, medical, automotive and power electronics, as well as for applications in general purpose electronic and telecom systems. It provides high level of reliability with rapid response times for near instantaneous protection.

It is mainly used as an over-voltage protection device for sensitive equipment, providing protection from power surges that may occur in power line disturbances, lightning and electrostatic discharge (ESD). The device can also provide EMI/RFI filtering against high-energy transients, such as those caused by motors and lightning.

Working Principle

The SA160A is designed with a clamping technology that allows the device to react quickly to overvoltage transients and clamp the undesirable voltage to a predetermined safe level. The voltage level is maintained by the device until the surge dissipates. The device is capable of providing a very low leakage current when the power supply is turned off or when the supply goes beyond its working range.

The device contains a two-terminal zener diode placed between the anode and cathode terminals. In this diode, reverse breakdown occurs when the applied voltage exceeds a certain voltage, typically 6.7kV. When this happens, the diode starts to conduct and it clamps the voltage at this level.

The SA160A is a surface-mount TVS diode, and is capable of withstanding repeated pulse voltages up to 6.7 kV. It comes in two standard packages, a 0603 surface mount package and a SOT-23 package. It also comes in a variety of configurations which makes it suitable for numerous circuit protection applications.

Conclusion

In summary, the SA160A is a premium TVS diode which is highly reliable and able to provide superior surge protection for sensitive electronic equipment. With its low leakage current, repeat voltage level up to 6.7kV, multiple mounting options, and wide range of available packages, the SA160A is a great choice for many applications in the automotive, medical, industrial, and telecom sectors.

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