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TVS - Diodes

The Metal Oxide Varistor Silicon-Mantel Junction (MXLSMBJ9.0CA) is a device used to limit voltage transients in electronics. It comprises of a Zener diode with a dedicated high energy clamping network and is used to protect circuits against high energy voltage transients with an 8/20µs waveform, typically caused by lightning weather systems, or by other externally created surge pulses. These devices are increasingly in demand as their small size allows for them to be used in a wide variety of applications, without any need to modify a board’s design, making them attractive to both engineers and businesses who require minimal disruption to the design process.

Application Fields

The MXLSMBJ9.0CA is used in a variety of industrial, telecommunications, and consumer applications. In industrial applications, this device is used for board-level protection of microprocessors, metal oxide varistors, gate drivers, electrostatic sensitive components, memory modules, and other sensitive digital circuits from surge related damage. By providing a low clamping voltage, this device helps to protect the circuits against overvoltage damage caused by large voltage transients. The consumer applications that can use this device are usually related to home electronics, which can include lighting systems, digital television, appliances, modems, and power supplies.

Working Principle

The MXLSMBJ9.0CA provides effective protection against high voltage transients by combining the high surge performance of a Zener diode with a dedicated high energy clamping network. After a surge or voltage spike is applied to the device’s inputs, the Zener diode begins to conduct current. This current then passes through the Zener diode and is limited by the clamping network which is designed to limit the maximum voltage and the maximum current. After the surge has dissipated, the Zener diode reverts to a low current state, and the device is ready for the next surge. The Zener diode and clamping network together provide a high energy tolerance to a maximum of 100V.

Conclusion

The MXLSMBJ9.0CA is a device used to protect circuits from high voltage transients with an 8/20µs waveform. The device combines the high surge performance of a Zener diode with a dedicated high energy clamping network, limiting the voltage and current to provide protection for digital and analog circuits. The MXLSMBJ9.0CA is ideal for industrial, telecommunications, and consumer applications due to its small size and easy integration into existing boards.

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