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TVS - Diodes

Transient Voltage Suppressors (TVS) Diodes are a type of protection diode that are used to protect semiconductor components from large voltage spikes and surges, whether they are caused internally or externally. More specifically, the MXLSMLJ75CAE3 is a Surface Mount Uni-Directional Varistor Voltage dependent TVS Diode.

Applications

The MXLSMLJ75CAE3 is typically used in applications such as high surge motor drives, motor controls, power tools, security devices, automotive, and in any other environment where transient overvoltage protection is needed. It does this by protecting sensitive devices against voltage surges, electro-magnetic interference (EMI) and electrostatic discharge (ESD). It also provides bidirectional protection and can be soldered directly to the printed circuit board (PCB).

Working Principle

The MXLSMLJ75CAE3 consists of an anode and a cathode, which are connected parallel to each other. When a voltage surge hits the device, the surge current is immediately shunted to the anode by the protection diode on the internal varistor. The varistor then acts as a voltage-dependant resistor, reducing the voltage to a safe level and providing protection to the sensitive components or system.

The MXLSMLJ75CAE3 has a breakdown voltage of 7.5V, a cutoff voltage of 6.5V, and a capacitance of 2,000pF. In addition, it has a peak pulse power rating of 600 Watts and a rated surge current of 2,000 Amps. It is also capable of handling energy levels up to 4,000 joules, making it suitable for a wide range of applications. The device is also compliant with RoHS and offers superior temperature stability and thermal-aging characteristics.

Conclusion

TVS diodes, such as the MXLSMLJ75CAE3, are instrumental in protecting sensitive components and systems from voltage surges, EMI, and ESD. They are designed to provide protection to motor drives, motor controls, power tools, security devices, and automotive applications, as well as other environments where transient overvoltage protection is needed.

In addition to the MXLSMLJ75CAE3, there are other devices available with different ratings, such as peak pulse power and surge current capacity. When selecting a TVS diode, it is important to consider the current ratings, the peak power rating, the breakdown voltage and the capacitance. As always, it is recommended to select a device with ratings that exceed your application’s requirements.

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