MP5KE7.5CA

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TVS (Transient Voltage Suppressor) diodes are special robust diodes with a special construction to protect sensitive electronic circuits from overvoltage transients, such as electrostatic discharges and lightning strikes. MP5KE7.5CA is a TVS diode specifically designed for automotive applications.

MP5KE7.5CA Application Field

MP5KE7.5CA is a unidirectional device with a fast-acting response and a low stand-off voltage, designed to protect electronic devices from over-voltage transients. Typical application fields include electronic systems in automotive industries, such as data bus lines, ECUs, instrument clusters, and sensors and actuators. It is particularly useful in applications such as automotive body electronics or the interior equipment.

The device is designed to provide robust over-voltage protection that can instantly absorb transient voltages up to 20V and handle high-energy pulses of up to 400W. It also features a low profile package and improved I/O capacitances for minimized line reflection and improved data communication reliability.

MP5KE7.5CA Working Principle

The MP5KE7.5CA TVS diode integrates a zinc oxide varistor, which is a highly non-linear resistor. The varistor exhibits a reverse-biased voltage-dependent behaviour similar to a diode. When exposed to an over-voltage impulse, the varistor exhibits very low resistance, diverting current away from the sensitive component it’s protecting.

The device is designed to be fast-acting and quick to respond to over-voltage transients, with a response time of under 1µs, but stops upon detecting normal voltage, restoring the normal performance of the circuit. It also dissipates energy in the form of heat as it absorbs over-voltage current wells, up to a 400W peak pulse.

The device is designed to be compatible with automated assembly lines, as it is available in a robust plastic SOT23 package and supports standard reflow soldering procedures.

Conclusion

MP5KE7.5CA is an example of a TVS diode specifically designed for automotive application, integrating a zinc oxide varistor and a unidirectional behaviour to protect sensitive electronic circuits from over-voltage transients. The device is typically used in automotive ECUs, instrument clusters, and data bus lines, providing robust protection that can instantly absorb transient voltages up to 20V and handle high-energy pulses of up to 400W.

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