SM30T35AY

TVS - Diodes

Transient Voltage Suppressor (TVS) diodes, unlike ordinary diodes, are designed to protect equipment and circuits from voltage transients, including those caused by the switching of heavy loads, load dump, and other events. The SM30T35AY is a 600W (30A, 400V) TVS diode.

Application Field

The SM30T35AY is suitable for circuit protection in vehicular applications, including automotive power supplies, wiring, audio systems, electric control systems, and anti-interference systems. The device also works well in telecommunications equipment, consumer electronics, military electronics, and industrial electronics, to provide electrical protection from transient voltages.

Working Principle

Ordinary diodes are designed to conduct current in only one direction. In contrast, TVS diodes are designed to conduct current equally in both directions. TVS diodes provide both a current guide and a voltage-clamping function; this prevents a voltage transient from reaching its target by dissipating it into the ground. The SM30T35AY is rated for a peak pulse current of 300A and a holding current of 4mA, while the breakdown voltage is 400V. This ensures that transients are safely clamped to a safe voltage level.

Conclusion

TVS diodes like the SM30T35AY are essential components with numerous applications in automotive, telecommunications, consumer, military, and industrial electronics. Their ability to quickly dissipate voltage transients, while providing current and voltage clamping, makes them a reliable protector of critical circuits.