SA170A A0G

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A Transient Voltage Suppression (TVS) diode is an important part of electrical systems, supplying both protection and signal level conversion. TVS diodes provide protection against over-voltage, transients, and other events that can damage or degrade the performance of connected circuits. The SA170A A0G is a unidirectional unipolar diode specifically designed for over-voltage protection against voltage transients, particularly those generated by electrostatic discharges. It is suitable for applications such as DC power supply and TV/monitor protection, automotive control unit protection, peripheral and communication device protection.

Overview

The SA170A A0G is based on P-type Zener voltage protection technology. It is a unidirectional unipolar silicon diode, which means it only conducts current in one direction. Its operating voltage is around 7z, and the breakdown voltage is approximately 8.2z. It has a low reverse leakage current, usually just a few microamps. It has a very fast response time, of less than several nanoseconds, making it ideal for use in transient protection circuits. The diode is also very small and can be packaged in a wide variety of different formats, making it suitable for most applications.

Application Field

The SA170A A0G is suitable for a wide range of applications, including but not limited to DC power supplies, AC voltage transients protection, UPS protection, cell phone and communication equipment protection, and automotive equipment protection. It can also be used for the control units of audio and video equipment, telecom equipment, PCs, and gaming systems.

The SA170A A0G is also suitable for high-speed switching applications, such as MOSFET, any AC/DC inrush current and EMI/RFI filtering. The diode can be connected with other components to provide improved performance, for example by using a low-impedance shunt. This can be used in situations where low voltage spikes may result in interference with connected circuits.

Working Principle

The working principle of the SA170A A0G is simple. When the voltage across the diode exceeds the reverse breakdown voltage, current starts to flow from anode to cathode. This current passes through a low-impedance path created by the diode, limiting the voltage across the equipment being protected. When the voltage across the diode drops again below the breakdown voltage, the current stops flowing, and the protection is then removed.

The SA170A A0G is designed to provide protection against electrostatic and other transient discharges. It is not intended for use in applications where the source voltage might exceed the reverse breakdown voltage for extended periods of time. In this case, an additional circuit may be required for full protection.

Conclusion

The SA170A A0G is a unidirectional unipolar diode specifically designed for over-voltage protection against voltage transients, particularly those generated by electrostatic discharges. It is suitable for a wide range of applications, including DC power supplies, AC voltage transients protection, UPS protection, cell phone and communication equipment protection, and automotive equipment protection. It works by providing a low-impedance path for the current when the diode is subjected to over-voltage, limiting the voltage across the equipment being protected. This makes it ideal for use in transient protection circuits.

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