MSMP18A-M3/89A Circuit Protection

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TVS - Diodes

TVS (transient voltage suppression) diodes are semiconductor devices used for protecting electronic components from high-voltage or high-energy power surges, overvoltage transients, or electrostatic discharges. The most common TVS diode is the MSMP18A-M3/89A, used in consumer electronics, medical and industrial applications. In this article, we will discuss the application field and working principle of this diode.

Application field

MSMP18A-M3/89A TVS diodes are widely used in different electronic circuit protection. It is suitable for applications such as consumer electronics, communication systems, LCD TV and monitors, power supplies, LED lighting, and automotive electronics. It also provides protection from in-rush current protection, overvoltage protection, short-circuit protection, overcurrent protection, and electrostatic discharge protection.

Working Principle

MSMP18A-M3/89A is an unidirectional diode and most commonly operates in the breakdown mode. The voltage at which this diode starts conducting is called the breakdown voltage (VBR). When the power source exceeds the diode\'s breakdown voltage, the diode will turn on and begin conducting current. The amount of current that can flow through the diode is limited by the diode\'s peak current rating (IPK). When the voltage or current exceeds the peak current rating, the diode will enter a mode of overcurrent protection.

In addition to its breakdown protection, the MSMP18A-M3/89A also provides protection against electrostatic discharges. This is done by having an additional breakdown voltage, in this case, the ESD (electrostatic discharge) breakdown voltage (VESD). When the diode is exposed to an electrostatic discharge, it will start conducting at a lower voltage than its normal breakdown voltage. This reduces the amount of damage caused by the electrostatic discharge.

The MSMP18A-M3/89A also has a fast turn-on time for its protection, meaning that it can respond quickly to overvoltage transients. This makes it suitable for use in circuits that require a fast response time for protection, such as in LCD TV and monitor applications.

Conclusion

The MSMP18A-M3/89A is a versatile and reliable TVS diode, offering protection from overvoltage transients, electrostatic discharges, and overcurrent protection. Thanks to its fast turn-on time, it is suitable for use in sensitive electronics such as LCD TVs and monitors. The MSMP18A-M3/89A is an affordable and easy to use protection solution for consumer electronics, medical and industrial applications.

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