4N25S(TA)

Overview

The 4N25S(TA) is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an NPN phototransistor with a base lead for improved switching performance and isolation voltage of 5000 Vrms. The device operates within a temperature range of -55°C to +110°C and utilizes a surface-mount package configuration.

Feature Summary

• Integrates an infrared emitting diode with an NPN phototransistor featuring a dedicated base terminal for enhanced control.

Applications

• Power supply regulators
• Digital logic inputs
• Microprocessor inputs

Procurement Notes

Verify the specific suffix TA against official Everlight documentation to confirm surface mount compatibility and RoHS compliance status. Confirm current availability as distribution channels may vary. Ensure the component meets required isolation voltage standards for the intended circuit design before procurement.

Selection Notes

Select this component when surface mount assembly is required for high-voltage isolation applications. The integrated base allows for faster turn-off times compared to standard phototransistors. Verify that the thermal management capabilities align with the operating environment requirements.

Part Context

This part belongs to the 4N2X series of transistor output optocouplers, which are designed for general-purpose isolation tasks. The series typically includes variants like the 4N25 and 4N26, offering robust electrical isolation between input and output circuits in compact packages suitable for modern electronic designs.

Replacement Considerations

Compatible substitutes include the 4N25S and 4N26M from Everlight, provided pinout and isolation specifications match. Cross-reference datasheets to ensure equivalent current transfer ratios and operating temperatures before implementation.