MAP4KE27CA

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TVS (Transient Voltage Suppressor) diodes are designed to protect circuit components from electrostatic discharge (ESD), lightning, and other transient voltage forces. The MAP4KE27CA is a part of this family, and is used for protection of components against voltage transients induced by lightning and other transient voltage events. This article will discuss the application fields and working principles of the MAP4KE27CA.

Application Fields

The MAP4KE27CA is designed for general-purpose transient voltage suppressor applications. It is suitable for use in portable electronics, local area networks (LANs), peripheral devices, and other consumer electronics applications. The device is also suitable for protecting sensitive semiconductors from damage due to overvoltage transients. Its small size and low profile enable it to be used in small PCBs and PCB assemblies.

Working Principle

The MAP4KE27CA Transient Voltage Suppressor works by quickly diverting surge current away from vulnerable components. The device has an internal Zener diode which conducts current to ground once the voltage at its anode exceeds its rated clamping voltage. The device’s breakdown voltage, or clamping voltage, is determined by its Zener voltage and surge current tolerance. The breakdown voltage is typically between 33V to 500V for the MAP4KE27CA.

In normal operation, the diode is reverse-biased and acts like an open circuit, allowing signals to pass through. When a surge is detected, the diode becomes forward-biased and conducts current to ground, thus limiting the voltage across the device to its breakdown voltage. The device has a very fast response time of less than 1us, enabling it to limit voltage transients to safe levels and help to protect vulnerable components. The device also has a low parasitic capacitance, ensuring minimal signal distortion.

Conclusion

The MAP4KE27CA transient voltage suppressor is a general-purpose diode designed to protect sensitive components from voltage transients. The device works by rapidly diverting surge currents away from vulnerable components and limiting the voltage to safe levels. The device has an internal Zener diode which clamps the voltage at its breakdown level and also has a fast response time and low parasitic capacitance. The MAP4KE27CA is suitable for a wide range of applications, including portable electronics, LANs, consumer electronics applications, and other applications where protection from transient voltage events is required.

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