SFH600-4X

Overview

The Isocom Components SFH600-4XG is a single-channel through-hole optocoupler featuring an NPN phototransistor output in a 6-pin DIP package. It offers a maximum forward voltage of 1.65V and supports a maximum input current of 60mA DC. The device provides high isolation with a rated voltage of 5300Vrms. Electrical performance includes a typical rise time of 2µs and a typical fall time of 11µs. The Current Transfer Ratio (CTR) ranges from a minimum of 200% to a maximum of 400%, ensuring reliable signal transmission for digital isolation applications.

Feature Summary

• NPN phototransistor output configuration for standard switching applications
• High dielectric isolation capability suitable for safety-critical circuits
• Fast switching speed characteristics with microsecond-level response times
• Wide CTR range providing robust gain margin across operating conditions

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits between microprocessors and peripheral devices
• Power supply feedback loops requiring galvanic separation
• Solid-state relay driver circuits for AC/DC load switching

Procurement Notes

Verify the specific suffix designation, such as 'G' or 'SM', against official datasheets to confirm lead frame material, plating specifications, and tape-and-reel availability. Ensure that the selected variant matches the required pin pitch and package dimensions for the target PCB footprint. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm current production status and compliance certifications before finalizing procurement orders.

Selection Notes

Select this component when a single-channel isolation barrier with NPN output is required. The 6-pin DIP format accommodates higher voltage isolation ratings compared to standard 4-pin variants. Evaluate the CTR requirements to ensure compatibility with the driving circuit's current limits. Consider the thermal management capabilities if operating near the upper temperature extremes defined in the specification sheet.

Part Context

This device belongs to the SFH600 series of optocouplers manufactured by Isocom Components. The series is designed to replace legacy industry-standard parts while offering enhanced performance metrics. Isocom specializes in providing alternative sources for discontinued or hard-to-find optoelectronic components, maintaining compatibility with established design architectures.

Replacement Considerations

Direct replacements include the Vishay SFH600-4 and equivalent generic NPN phototransistor optocouplers with matching 6-pin DIP packaging. Verify pinout compatibility and electrical parameter overlaps, specifically isolation voltage and CTR ranges, before substituting.