MA1.5KE75AE3

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MA1.5KE75AE3, belonging to the TVS diode series, is a surge protector, protecting devices from up to 75A of surge current and 1500W transient power. It is frequently used in consumer and industrial electronic systems, including mobile phones, computers, medical instruments, household electrical appliances, monitoring systems, industrial control systems, and so on.

A TVS diode is typically a bidirectional device composed of a diode and a semiconductor with a well-defined breakdown voltage. During operation, it provides a very low impedance path to the surge current until the surge energy is no longer available, then it returns to its high impedance state. TVS diodes protect against transients and surges caused by inductive switching, lightning strikes, and other sources of high energy.

The MA1.5KE75AE3 is constructed with a cathode (K) and an anode (A) which are connected via a fine aluminum bonding wire to an insulated ceramic substrate. The dielectric insulation is generally provided by a ZnO-based dielectric material. The device is mounted using conductive adhesive on top of a solder coated land of the printed circuit board.

The working principle of the MA1.5KE75AE3 is based on a “snap-off” mechanism. When a voltage higher than the rated breakdown voltage is applied across the anode and cathode, the p-n junction between them becomes highly conductive in a single direction. This creates a low-resistance path for the surge current, allowing it to pass quickly and safely through the device. As the current passes through the device, it causes a self-limiting effect which prevents the current from exceeding the rated threshold. Once the surge is extinguished, the device returns to its high-resistance state.

In summary, the MA1.5KE75AE3 is a TVS diode which has a wide range of applications, including consumer and industrial electronic systems. Its working principle is based on the “snap-off” mechanism, allowing it to provide efficient protection against transients and surges.

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