SMBJ440A-TP

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The SMBJ440A-TP Transient Voltage Suppression (TVS) Diode is designed to protect sensitive electronic customer applications from short power transients and overvoltage conditions. It provides protection to delicate electrical systems from Electrostatic Discharge (ESD), inductive switching noise, cable discharge events, power cross, lightning, and other transient voltage events. It is particularly suited for protecting a broad range of motherboard and hard drive controller ICs.

The SMBJ440A-TP is a unidirectional TVS diode which is a two-terminal device consisting of anode and cathode. The anode is connected to the power source while the cathode is the reference point, and the two opposite sides are separated by a protection gap between P (positive) and N (negative). The breakdown voltage can either be negative or positive depending on the sign of voltage applied. The breakdown voltage is proportional to the working current.

The protection gap is a series of reverse-biased avalanche diodes. When a transient voltage appears, it causes an increase in current, resulting in an avalanche breakdown and the presence of a conductive region between the anode and the cathode. This region can actively dissipate the transient voltage or current and effectively protect the device from damage. The SMBJ440A-TP provides voltage protection up to 440 volts peak, and can handle up to 135 amperes of pulse current.

The SMBJ440A-TP is designed to protect electronic systems from overvoltage conditions and power transients. It can be used to protect systems such as DC boost DC/DC converters, digital isolators, audio amplifiers, embedded systems, telecom circuits, motor drivers, power supply systems, automotive systems, industrial systems, and medical equipment. In addition, it can also be used for providing surge protection for telecom, power line, and data line applications.

The working principle of the SMBJ440A-TP is based on the principle of electronic protection. It has an anode and a cathode, and when the power supply voltage exceeds the specified breakdown voltage, an avalanche breakdown occurs in the protection gap between the anode and the cathode, providing protection against transient voltages or currents. The device is designed for devices with high speed switching, providing protection from surges caused by ESD, power cross, and lightning events.

In conclusion, the SMBJ440A-TP Transient Voltage Suppression (TVS) Diode is designed to protect sensitive electronic customer applications from short power transients and overvoltage conditions. It provides protection up to 440 volts peak and can handle up to 135 amperes of pulse current. It is designed to protect electronic systems from ESD, inductive switching noise, cable discharge, power cross, and lightning events. The device is also used to provides surge protection for telecom, power line and data line applications.

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