SFH628A-3XSM

Overview

The SFH628A-3XSM is a surface-mount optocoupler manufactured by Isocom Components 2004 LTD. It features one channel with an inverse parallel infrared LED input and an NPN silicon phototransistor output. The device provides 5300Vrms isolation voltage and supports a maximum forward current of 50 mA. Key electrical parameters include a typical rise time of 4µs, fall time of 3µs, and a minimum current transfer ratio of 100% at 10mA input.

Feature Summary

• Inverse parallel LED configuration for AC input compatibility
• High isolation voltage rating for safety applications
• Surface mount package for automated assembly

Applications

• Logic-to-logic isolation in noisy environments
• Line receiver circuits
• Computer and peripheral device interfaces

Procurement Notes

Verify the specific suffix '3X' against official datasheets to confirm pinout and electrical tolerances. Confirm RoHS compliance status as manufacturing processes may vary. Ensure the surface mount footprint matches the design layout before finalizing procurement.

Selection Notes

Select this component when AC signal detection or bidirectional input is required due to the inverse parallel LED structure. The high isolation voltage makes it suitable for mains-connected interfaces. Verify that the 50mA forward current limit meets the drive requirements of the target circuit.

Part Context

This part belongs to the SFH628A series, which utilizes inverse parallel infrared LEDs paired with NPN phototransistors. This architecture distinguishes it from standard single-LED optocouplers by enabling direct AC input handling without external rectification components.

Replacement Considerations

Direct substitutes include SFH628A-3XSMT&R from Isocom Components. Other compatible options within the same family are SFH628A-3X and SFH628A-3XSM.