SP0505BAHT

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Introduction to TVS-Diodes

A transverse voltage suppressor (TVS) diode is a semiconductor device that typically consists of two separate PN junction diodes, both configured in the same direction such that they provide a greater reverse breakdown voltage. In fact, this added capability has made TVS diodes particularly popular as voltage clamping devices.

Application Field of SP0505BAHT

SP0505BAHT is a fast-acting, low-power TVS diode intended for the protection of electronic equipment exposed to transverse voltages. The device is qualified to AEC-Q101 standards for automotive applications and offers an excellent peak pulse current. It also has a wide operating temperature range of -55°C to +150°C.

Due to its low junction capacitance and low leakage current, SP0505BAHT can be used in applications such as telecom equipment, power supplies, automotive modules, as well as consumer and communication devices. It is suitable for board-level applications in which a robust protection device is needed to guard against high-energy transverse events.

Working Principle of SP0505BAHT

In normal circumstances, the two PN junction diodes that constitute the TVS diode are highly non-conductive, meaning that voltage is limited to a certain safe level. When an external transient voltage exceeds the peak working voltage of the TVS diode, the electric field at the PN junction increases, causing the device to go into a conduction mode. This limits the peak voltage across the device to the specified clamp voltage.

In the case of SP0505BAHT, the PN junction will react within 50 nanoseconds to reduce the voltage below the specified clamp voltage. The device will reset itself within 50 microseconds, allowing the TVS diode to be used numerous times.

For additional protection and safety, the SP0505BAHT is equipped with a “strain relief” feature. This ensures that if the external transient is of a sufficient magnitude, the device will be able to dissipate the energy without any physical damage occurring.

In addition, the device is also equipped with “fuse protection” which will activate in case of a sustained overcurrent condition. The fuse protection works to limit the amount of current that can pass through the device, preventing further damage from occurring.

Conclusion

In conclusion, SP0505BAHT is an excellent example of a modern TVS diode. Its combination of low power consumption and robust protection features ensures that the device is suitable for use in a variety of applications. The device’s fast-acting response times and its wide operating temperature range make it an ideal choice for modern board-level designs.

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