4N25XSMT&R

Overview

The 4N25XSMT&R is a surface-mount optocoupler from Isocom Components, featuring a single channel with an infrared LED input and NPN silicon phototransistor output. It provides 5300 VRMS isolation voltage and supports a maximum forward current of 60 mA. The device operates within a temperature range of -55°C to 100°C and utilizes a 6-pin SMD package.

Feature Summary

• Integrates an infrared emitting diode with an NPN silicon phototransistor for signal transmission
• Provides high electrical isolation between input and output circuits
• Designed for surface-mount assembly in compact electronic systems

Applications

• General-purpose digital signal isolation
• Microprocessor system interface circuits
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'XSMT&R' against official Isocom documentation to confirm pinout and packaging details. Ensure compatibility with existing PCB footprints and reflow soldering profiles. Cross-reference datasheets for thermal management requirements during integration.

Selection Notes

Select this component when a standard NPN phototransistor output with moderate speed is required. Consider the 6-pin SMD form factor for space-constrained designs. Verify that the 5300 VRMS isolation rating meets safety standards for the target application environment.

Part Context

This part belongs to the 4N25 series of optically coupled isolators. The series typically includes variants like 4N25, 4N26, 4N27, and 4N28, which share similar internal structures but may differ in current transfer ratio or switching speed specifications.

Replacement Considerations

Direct substitutes include other 4N25-series SMD variants such as 4N25SMT&R. Verify pin compatibility and electrical parameters before substitution.