MXLSMBJ15A Circuit Protection

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MXLSMBJ15A is one of the most popular types of TVS-Diodes used in electronic circuits today. It is an unidirectional rectifier diode with an internal PN junction with an avalanche voltage breakdown of 15V at peak current. It is designed for use in a variety of applications. In this article, we will discuss the application field and working principle of MXLSMBJ15A.

What Is a TVS-Diode

TVS-Diodes are commonly used in a variety of electronic applications as transient voltage surge suppressors, which are designed to protect sensitive components from damaging transients. They are low internal resistance, making them able to absorb high surge currents and dissipate them as heat. TVS-Diodes may be bidirectional or unidirectional and are available in various voltage ratings.

Application Field of MXLSMBJ15A

MXLSMBJ15A is an unidirectional TVS-Diode with an internal avalanche voltage breakdown of 15V at peak current. It is ideal for use in low voltage applications such as automotive electronics, communication equipment, and consumer electronics. It can also be used in high-speed communication links and data lines. It is able to protect components from both ESD and EMI, making it ideal for use in high-frequency applications. It can also be used for added protection in sensitive parts of a circuit. It is designed for both high-temperature and humidity operating environments, making it suitable for many industrial applications.

Working Principle of MXLSMBJ15A

The functioning of MXLSMBJ15A is based on the principle of Zener breakdown. A Zener junction consists of two opposing PN junctions, with an additional layer placed between them. When the voltage across the two junctions reaches the avalanche voltage breakdown, the current will increase suddenly. This is known as Zener breakdown and the component is essentially an avalanche diode.

When a transient voltage is applied across the MXLSMBJ15A, it will start to conduct and the current will avalanche down the junction. During this time, the diode will consume some power and dissipate it as heat. This is then transferred to the environment, thus eliminating the surge. This also works for EMI frequencies due to the capacitor. The diode’s low capacitance allows it to quickly absorb high-frequency EMI waves.

Once the transient voltage passes, the protection circuit will reset automatically, re-establishing the correct voltage supply. In conclusion, MXLSMBJ15A offers efficient protection from overvoltage, voltage transients, ESD, and EMI.

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