SMBJ250AE3/TR13

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Introduction
SMBJ250AE3/TR13 is a surface mount TVS diode, designed for transient over-voltage protection in various industrial and consumer electronics applications. The SMBJ250AE3/TR13 is packaged in the industry standard SOT-23 package, and is available on tape and reel. It has an uni-directional working principle, which means it can only offer protection when subjected to transient, over-voltage signals in one direction.

Application Field
The SMBJ250AE3/TR13 is designed to protect sensitive electronic equipment from transient over-voltage, providing bidirectional protection. It is suitable for use in applications such as cellular and two-way radios, notebooks and PDAs, game consoles, computer systems, printers, copiers, test and measurement equipment, and battery-powered devices. It can also reduce the risk of accidental damage and electrical accidents due to unexpected surge voltages.

Working Principle
The SMBJ250AE3/TR13 has an uni-directional working principle, which means it can only offer protection when subjected to transient, over-voltage signals in one direction. When the input voltage exceeds the maximum reverse or forward breakdown voltage, the diode will switch to a low-voltage, low-current state. This low-voltage, low-current state provides a high impedance path for the transient pulse, thus protecting the circuit from potential damage.

In addition to its uni-directional working principle, the SMBJ250AE3/TR13 also features its own set of current limiting and clamping characteristics. When the transient voltage waveform exceeds the breakdown voltage and clamps the diode, the resulting waveform will be an attenuated version of the original spike, allowing the transients to be filtered out and the normal signals to be restored. The clamping voltage of the SMBJ250AE3/TR13 is typically 17.7V.

The SMBJ250AE3/TR13 is also designed with ESD (ElectroStatic Discharge) protection in mind. Its ESD capability is capable of withstanding up to 15kV contact discharge per the IEC61000-4-2 (ESD) standard, making it suitable for applications requiring high levels of ESD protection.

Conclusion
The SMBJ250AE3/TR13 is a surface mount TVS diode designed for transient over-voltage protection in various industrial and consumer electronics applications. Featuring an uni-directional working principle and ESD capabilities, the SMBJ250AE3/TR13 is suitable for cellular and two-way radios, notebooks and PDAs, game consoles, computer systems, printers, copiers, test and measurement equipment, and battery-powered devices. With its ability to provide a high impedance path when clamping transient voltages, the SMBJ250AE3/TR13 can effectively reduce the risk of accidental damage and electrical accidents due to unexpected surge voltages.

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