SMBJ3V3HE3/5B

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TVS (Transient Voltage Suppression) diodes are used to protect electronic devices from electrical surges. The SMBJ3V3HE3/5B is a three-terminal bidirectional device designed to protect sensitive electronics against transient overvoltage that could damage or destroy them. It can be used in a variety of applications from power supplies to data communications and automotive electronics. This article will discuss the application fields and working principles of the SMBJ3V3HE3/5B.

Application Fields

The SMBJ3V3HE3/5B is suitable for a variety of applications. It is perfect for overvoltage protection of telecommunication lines, data lines, and broadcast audio/video systems. It is also useful for protecting sensitive digital and analog systems from transients caused by load switching, lightning, ESD (electrostatic discharge) and other surges. It can be used in automotive electronics, power supplies, test and measurement equipment, factory automation systems, and other DC supplied systems.

Working Principles

The SMBJ3V3HE3/5B uses a unique working and structure to provide protection from transient overvoltage. It features four components: two diodes placed anode-to cathode, a PN junction, and a resistor. This allows it to quickly clamp the overvoltage (up to 5.4 Volts) to protect sensitive electronics from damage. It is also able to suppress high energy transients up to 600 Watts.

The device is able to act as a bidirectional protector by having the two diodes connected in reverse parallel. This creates a bridge circuit, which provides protection for both polarities. The PN junction works by providing a highly resistive path during normal operation. This prevents excessive current from flowing through the device when an overvoltage occurs. Lastly, the resistor is used to limit the clamping voltage in order to avoid damage to the protected device.

The SMBJ3V3HE3/5B is able to protect sensitive electronics at a higher level of reliability compared to other transient voltage suppression devices. It is designed for high-speed switching, fast response, and low leakage current. It is also designed to be compatible with most carriers for telecommunication applications. The device is packaged in a small SOT-323 package, which makes it easy to mount on any board.

Conclusion

The SMBJ3V3HE3/5B is an ideal choice for protecting sensitive electronic devices from transient overvoltage. It features four components: two diodes, a PN junction, and a resistor, which allows it to quickly clamp the voltage and protect sensitive circuits from damage. It is designed for high-speed switching, fast response, and low leakage current, making it perfect for a variety of applications. It is packaged in a small SOT-323 package, which makes it easy to mount and use in any board.

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