SMF28AT1G Circuit Protection

TVS diodes are commonly used in the electronics industry in order to protect devices from transient voltage spikes. The SMF28AT1G is a TVS diode designed specifically for use in circuit protection applications. It is capable of protecting circuits up to 28V from transient surges.

Types

The SMF28AT1G is available in two distinct types. The first type is a single-channel device which is designed to provide protection to single-ended lines, while the second type is a dual-channel device which is capable of protecting both positive and negative lines simultaneously.

Applications

The SMF28AT1G is most commonly used in automotive, industrial, and consumer applications. In the automotive industry, it is used to protect against other voltage spikes from adjacent circuits such as high voltage battery lines or may be incorporated into the printed circuit board in order to protect the sensitive electronics it contains. The device is also used in consumer applications where it serves to protect equipment from transient voltage surges.

Working Principle

SMF28AT1G devices are designed to offer protection against transient voltage, both positive and negative, up to 28V. The device works by diverting any voltage above this level to ground via a special element called a crowbar. The element acts like a switch, switching off any power lines when the voltage exceeds its rated value. It then reapplies the power when the voltage drops below the rated level.

The SMF28AT1G device also includes a clamping mechanism which is designed to ensure any transient voltage is diverted to ground while still allowing normal levels of current to pass through. The combination of the crowbar and the clamping mechanism provide the device with its excellent protection capabilities against transient voltages.

Conclusion

In conclusion, the SMF28AT1G is a TVS diode designed for circuit protection applications, offering reliable protection against transient voltages up to 28V. The device is available in both single and dual channel versions, and is used in a variety of industries, including automotive, industrial, and consumer electronics. The device works primarily through a combination of a crowbar which can switch off power lines in the event of a voltage spike and a clamping mechanism which diverts any excess voltage away from the protected circuit.