SM8S43ATHE3/I

SM8S43ATHE3/I is commonly used as a thyristor (triac) surge protection device. It is designed for over-voltage (OVP) protection and circuit stability. The device is available in two different packages, including a through-hole medium-power package for higher-power applications and a surface-mount, low-power package for lower-power applications. The SM8S43ATHE3/I provides adjustable over-voltage protection through the use of voltage references and feedback. It is designed to protect and reduce the effects of power line surges, protecting sensitive electronic components from damaging voltage events.

Applications & Features

• Protection of TVs, VCRs, Stereos, CD Players, and other consumer electronics
• High EMI immunity
• High temperature range performance
• Highly adjustable for different surge levels
• High level of reliability in the most demanding environments

Working Principle

The SM8S43ATHE3/I is a two-input triac-type surge protection device with a voltage reference and feedback. This is the integrated circuit device of choice when protection from over-voltage events is desired but where low cost is also of paramount importance. Its two-input configuration for over-voltage protection allows the device to better meet the needs of the over-voltage protection circuit design. The device is designed to provide protection from surges that occur on the power line, as well as from surges caused by electro-magnetic interference (EMI).

When an over-voltage event occurs, the device quickly begins to conduct current. Up to the maximum rated current level, the electricity will pass through the device and dissipate the excess energy as heat. This effectively protects the sensitive electronic components from the damaging effects of the over-voltage event. The SM8S43ATHE3/I also provides a voltage reference and feedback, allowing the designer to adjust the threshold voltage needed to trip the protection circuit.

Conclusion

The SM8S43ATHE3/I is an excellent choice for over-voltage protection when low cost, high EMI immunity, and a wide temperature range of operation are desired. By providing adjustable over-voltage protection through the use of voltage references and feedback, this small integrated circuit device is able to provide superior protection and circuit stability in the most demanding environments. With its dual inputs and highly adjustable features, the device is an ideal choice for consumer electronics applications.