4N26S(TA)

Overview

The 4N26S(TA) is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features a GaAs infrared LED coupled to an NPN phototransistor with a base lead for improved switching performance. The device provides high isolation voltage of 5000 Vrms and operates within a temperature range of -55°C to +110°C. Key electrical parameters include a collector-emitter breakdown voltage of 80V, maximum forward current of 50mA, and typical rise/fall times of 3µs/3µs. It is housed in a 6-SMD gull-wing package.

Feature Summary

• Integrated base lead on the phototransistor enhances switching speed and reduces storage time compared to standard configurations.
• High insulation voltage capability ensures reliable signal transmission across isolated circuits.
• RoHS compliant construction supports environmentally conscious manufacturing standards.

Applications

• Power supply regulators
• Digital logic input interfacing
• Microprocessor system isolation

Procurement Notes

Verify the specific suffix TA against the manufacturer's latest datasheet to confirm packaging type and compliance status. Ensure the component matches the required surface mount footprint and pin configuration for your PCB design. Cross-reference the date code and lot number during incoming inspection to maintain quality control standards.

Selection Notes

Select this component when faster switching speeds are required compared to standard phototransistor optocouplers. The base terminal allows for external biasing or pull-down resistors to optimize turn-off characteristics. Consider the 6-SMD package constraints and thermal management requirements for high-temperature operation up to 110°C.

Part Context

This part belongs to the 4N2X series of transistor output optocouplers from Everlight. It shares functional similarities with through-hole variants like the 4N26 but offers surface mount convenience. The series is widely recognized for general-purpose isolation applications requiring robust electrical separation between input and output stages.

Replacement Considerations

Direct replacements may include other 4N26 series variants with compatible pinouts. Verify that substitute components meet the same 5000 Vrms isolation rating and 80V collector-emitter voltage specifications. Check for equivalent rise and fall times to ensure circuit timing integrity is maintained.