SM4T56CAY

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SM4T56CAY TVS - Diodes

A transient voltage suppressor (TVS) diode is a type of semiconductor which is used to protect a variety of electronic systems from high-voltage transient surges. This surge may be caused by any number of things, such as lightning strikes, ESD, or load switching. TVS diodes are often the last line of defense when it comes to protecting a device from over-voltage, and this is why they have become increasingly popular over the years.

The SM4T56CAY is a Surface-Mount 4-Pin Zener Bus TVS Diode designed to protect data and signal lines from damage caused by electrostatic discharge and electrical transients. The device can be easily integrated onto a PCB directly, eliminating the need of soldering to connectors. The diode is also RoHS compliant, making it an excellent choice for mainstream production.

Application Field

This SM4T56CAY is well suited for protection of data and signal lines used in electronic control systems, protecting systems against high voltage transient surges and ensuring long-term reliability. It can also be used in other sensitive electrical applications where a direct connection to the PCB is required. Some of the most common application fields for this TVS diode are automotive, industrial control systems, consumer electronics, and medical equipment.

Working Principle

The SM4T56CAY uses a Zener breakover voltage design to protect the data and signal lines from voltage transients. When the voltage applied to the diode exceeds the diode’s breakdown voltage, the Zener action produces a negative voltage drop across the diode which helps to clamp the voltage on the data or signal line. The reverse breakdown voltage of this TVS diode is 7.5-6V, while the on-state clamping voltage is 5.3-4.7V.

Additionally, the SM4T56CAY has a current-limiting capability which will limit the current that passes through it in the event of an over-voltage condition. This helps to further protect any equipment connected to the diode from damage. The diode also features excellent surge capability and low leakage current, ensuring that it continues to perform optimally for a long time.

Conclusion

The SM4T56CAY is an excellent choice for protecting data and signal lines from surges and high voltage transients. It can be easily integrated onto a PCB and is RoHS compliant. The device is suitable for a wide variety of applications, including automotive, industrial control systems, consumer electronics, and medical equipment. Additionally, the device features excellent surge capability, current-limiting, and low leakage current, providing reliable long-term protection.

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