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TVS - Diodes

Transient voltage suppression (TVS) diodes are a type of electronic diode designed to protect vulnerable circuitry from surge voltages caused by electrostatic discharge (ESD), electrical fast transients (EFT) and lightning. The MAP5KE12CA TVS diode is a 12 V unidirectional diode with 1500 W peak power dissipation, 15A peak forward surge current, and ±30V standoff voltage.

Application Fields

MAP5KE12CA TVS diodes are most commonly used in low-voltage, low-current electronic circuits such as microprocessors, logic devices, and various types of field-programmable gate arrays (FPGAs). The ability to suppress surge voltages and currents is particularly important in these types of circuits, as they are easily damaged by higher-than-normal voltages. The MAP5KE12CA is also suitable for use in a wide range of automotive and industrial applications, as well as in consumer electronics.

Working Principle

The MAP5KE12CA is a zener diode, meaning that it conducts in one direction and operates in a breakdown region in the other direction. It works by clamping positive surge voltages to its reverse breakdown voltage, thereby preventing them from reaching sensitive components in a circuit. In the reverse direction, the diode will block any current flow, thus protecting against short circuit currents. The reverse standoff voltage of the MAP5KE12CA is ±30 V, which means that it will begin conducting at any voltage higher than 30V in the reverse direction.

In the forward direction, the diode will remain non-conducting until the forward voltage reaches the forward breakdown voltage. The MAP5KE12CA has a peak forward surge current rating of 15A, meaning that it can tolerate 15 amperes of current before it begins to conduct. Once the voltage reaches the forward breakdown voltage, the diode will conduct, and it will remain conducting until the current drops back down to zero.

Conclusion

The MAP5KE12CA TVS diode is a low-voltage, low-current diode used to protect vulnerable circuit components from voltage surges caused by ESD, EFT, and lightning. Its low reverse breakdown voltage of ±30 V allows it to begin conducting at high voltages, while its peak forward surge current rating of 15A means that it can tolerate up to 15A of current before it begins to conduct. The MAP5KE12CA is suitable for use in low-voltage circuits, as well as in a variety of automotive, industrial, and consumer electronics applications.

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