4N25XG

Overview

The Isocom Components 2004 LTD 4N25XG is a single-channel optoisolator featuring a phototransistor output with base lead. It utilizes a 6-pin DIP package for through-hole mounting. Key electrical parameters include a maximum isolation voltage of 5300Vrms and a minimum current transfer ratio of 20% at 10mA input. The device supports DC input and provides a typical rise/fall time of 2µs. The output voltage rating is 30V, ensuring reliable signal transmission across isolated circuits.

Feature Summary

• Integrates a phototransistor output with an accessible base terminal for enhanced control flexibility
• Provides high-voltage galvanic isolation between input and output circuits
• Designed for direct coupling to logic families via standard through-hole packaging

Applications

• Signal isolation in microprocessor systems
• Solid-state relay driver circuits
• Logic level shifting between different voltage domains

Procurement Notes

Verify the specific suffix 'XG' against official manufacturer documentation to confirm pinout and mechanical dimensions. Ensure compatibility with existing PCB footprints. Confirm that the 6-DIP package style matches assembly requirements. Cross-reference datasheet revisions to validate electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when a base-connected phototransistor output is required for faster switching or linear operation compared to standard open-collector variants. Consider the 5300Vrms isolation rating for safety-critical applications. Evaluate the 2µs response time against system speed requirements. Verify that the 30V output voltage limit suits the downstream load conditions.

Part Context

The 4N25 series represents a widely adopted family of general-purpose optocouplers. The 4N25XG variant specifically denotes the version with a base lead on the phototransistor. This configuration allows for external biasing or faster discharge of junction capacitance. It serves as a cost-effective solution for basic isolation needs in industrial and consumer electronics.

Replacement Considerations

Direct substitutes may include other 6-pin DIP optocouplers with base leads, such as the PC817B (if base access is available) or similar generic equivalents. Verify pin-to-pin compatibility and electrical parameter equivalence. Note that some alternatives may lack the base terminal, altering circuit behavior.