4N28S1(TB)-V

Overview

The Everlight 4N28S1(TB)-V is a single-channel transistor output optocoupler featuring an NPN phototransistor with a base terminal. It provides galvanic isolation with a rated insulation voltage of 5000 Vrms. The device operates within a temperature range of -55°C to +110°C and utilizes a 6-SMD surface-mount package. Key electrical parameters include a typical current transfer ratio of 40-80% CTR, a collector-emitter saturation voltage of 500mV maximum, and turn-on/turn-off times of approximately 3µs. The component is designed for robust signal transmission in isolated circuits.

Feature Summary

• Integrated base terminal on the phototransistor for enhanced switching speed control
• High isolation voltage rating of 5000 Vrms for safety-critical applications
• Extended operating temperature range supporting harsh environments
• Surface-mount 6-SMD package design for automated assembly

Applications

• Industrial automation control systems
• Power supply feedback loops
• Signal isolation in communication interfaces

Procurement Notes

Verify the specific suffix (TB) against official datasheets to confirm packaging type and tape dimensions. Confirm RoHS compliance status through manufacturer documentation. Check for obsolescence notices as availability may be limited. Ensure pinout compatibility with existing PCB footprints before procurement.

Selection Notes

Select this component when base-controlled switching speed is required over standard phototransistors. Verify that the 5000 Vrms isolation meets system safety standards. Consider the 6-SMD footprint constraints during layout. Compare CTR specifications against input drive capabilities to ensure reliable saturation.

Part Context

This part belongs to the 4N28 series of transistor output optocouplers manufactured by Everlight Electronics. The series is widely recognized for general-purpose isolation tasks. The 'S1' designation typically indicates the specific lead frame and molding compound configuration for surface mount variants.

Replacement Considerations

Direct substitutes include other 4N28-series variants from Everlight or equivalent transistor-with-base optocouplers from manufacturers like Vishay or ON Semiconductor. Verify pinout compatibility and isolation voltage ratings when cross-referencing.