SFH615A-4

Overview

The SFH615A-4 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and utilizes a GaAs infrared diode emitter for high reliability. The device provides electrical isolation with a maximum insulation voltage of 5300 Vrms. Key electrical parameters include a minimum collector-emitter breakdown voltage of 70 V, a maximum collector current of 50 mA, and a forward current rating of 60 mA. The current transfer ratio ranges from 160% to 320% at 10 mA input. Typical switching times are 3 µs for rise time and 4.7 µs for fall time. The component operates within a temperature range of -55°C to +100°C and is housed in a DIP-4 package.

Feature Summary

• High reliability construction using a Gallium Arsenide (GaAs) infrared LED emitter
• Single channel configuration with NPN phototransistor output
• End-stackable design compatible with standard 2.54 mm lead spacing

Applications

• Signal transmission between electrically separated circuits
• General purpose digital signal isolation
• Industrial control system interfaces

Procurement Notes

Verify the specific suffix designation against official Vishay documentation to confirm exact mechanical dimensions and packaging type. Ensure that the selected variant matches the required isolation voltage ratings and thermal operating limits for the target application environment. Cross-reference manufacturer part numbers with authorized distributor listings to confirm authenticity and compliance status.

Selection Notes

Select this component when high isolation voltage and fast switching speeds are required for single-channel applications. Compare the 160% to 320% current transfer ratio against circuit gain requirements. Consider the DIP-4 through-hole package constraints versus surface-mount alternatives like the SFH615A-3 series if board space is limited. Verify compatibility with the driving logic levels and load conditions.

Part Context

The SFH615A-4 belongs to the SFH615A family of transistor output optocouplers from Vishay. This family includes variants such as SFH615A-1 and SFH615A-3, which differ primarily in current transfer ratio specifications and package types. The SFH615A-4 specifically offers a higher CTR range compared to lower-gain variants while maintaining the robust GaAs emitter technology characteristic of the series.

Replacement Considerations

Officially recommended alternative part numbers include VO615A-4 and SFH615A-4X007T. Verify pinout compatibility and electrical parameter equivalence before substitution.