MAP5KE28A

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TVS (transient voltage suppressors) diodes, such as the MAP5KE28A are widely used in today’s advanced electronics as a form of protection for equipment against overvoltages and/or voltage spikes. This type of diode must be able to withstand a considerable amount of current within a very short period of time, usually for a maximum of a few nanoseconds.

The MAP5KE28A TVS diode is meant to protect devices against transients and ESD (electrostatic discharge) events. While the rating on this model is 5kA peak 8/20µS surge current (Ipp). It has a working voltage of 28V and is rated for up to 1.2kV clamping voltage. The diode also has a response time of typically less than 0.5 nanoseconds, meaning it can provide short transient and ESD protection events.

The MAP5KE28A diode works in two very distinct stages. The first stage begins with the external spike in voltage or current, causing the diode to become forward-biased. This bias of the diode causes it to conduct, providing a low resistance path to ground, diverting the unwanted transients away from the circuit. As a result of this forward conduction, the spike current will quickly reduce in magnitude, going from a peak of 5kA during the initial 8/20µS surge down to a much more manageable level.

The second stage of the MAP5KE28A’s protection process begins once the initial surge has dropped in intensity. At this point the diode will transition to its reverse-biased state, effectively acting as an open circuit. This transition back to reverse bias will limit the final increase in voltage, clamping it and providing the additional protection needed from harsh external environment. This two-stage effect of the diode ensures maximum protection for the internal circuit from transients and ESD events.

The MAP5KE28A diode is widely used in areas such as electric power, security equipment, automotive, medical devices, consumer electronics, and many other industrial electronics. Its two-stage operation, small size, low-power consumption, and broad voltage range make it an ideal choice for providing protection in a wide variety of applications.

In conclusion, the MAP5KE28A TVS diode is a great example of a transient voltage suppressor (TVS) diode. Its ability to handle extremely high currents in a short period of time, excellent protection from transients and ESD, and widespread usage in many different areas have all combined to make it one of the most popular TVS diodes on the market today.

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