SFH609-3XG

Overview

The SFH609-3XG is a single-channel phototransistor output optocoupler manufactured by Isocom Components. It features a DIP-6 package and operates with a DC input current type. The device provides an isolation voltage of 2800 Vrms, ensuring robust electrical separation between input and output circuits. Key performance parameters include a minimum collector-emitter breakdown voltage of 70 V and a rated current transfer ratio of 40%. The component supports a maximum forward current of 60 mA and maintains operation within a temperature range of -55°C to 100°C.

Feature Summary

• Provides optical isolation for signal transmission between separate electrical circuits
• Utilizes a phototransistor output configuration for digital or analog switching applications
• Complies with UL recognition standards for safety certification

Applications

• General purpose signal isolation in industrial control systems
• Microprocessor interface circuits requiring galvanic isolation
• Solid-state relay driver stages

Procurement Notes

Verify the specific suffix 'XG' against official manufacturer documentation to confirm lead form and packaging specifications. Ensure that the required isolation voltage rating of 2800 Vrms meets the safety standards of the target application environment. Cross-reference the DIP-6 pinout with the circuit schematic to prevent installation errors during assembly.

Selection Notes

Select this component when a standard phototransistor output is sufficient for the isolation requirement. The 40% current transfer ratio indicates suitability for moderate gain applications. Consider the 70 V collector-emitter breakdown voltage limit when designing the output load circuit to ensure reliable operation under varying voltage conditions without exceeding device ratings.

Part Context

This part belongs to the SFH600 series of optically coupled isolators produced by Isocom Components. The series includes multiple variants such as SFH609-1 through SFH609-5, differentiated primarily by their current transfer ratio characteristics. The SFH609-3 variant specifically targets applications requiring a defined medium-gain response profile within the standard DIP-6 footprint.

Replacement Considerations

Direct replacements may include other SFH609 series variants like SFH609-1 or SFH609-2 if current transfer ratio differences are acceptable. Generic equivalents from other manufacturers offering similar DIP-6 phototransistor optocouplers with comparable isolation voltages can be considered after verifying pin compatibility and electrical limits.