4N28S1(TA)-V

Overview

The 4N28S1(TA)-V is a single-channel photovoltaic output optoisolator manufactured by Everlight Electronics Co Ltd. It features an infrared-emitting diode coupled with a photovoltaic detector, providing electrical isolation between input and output circuits. The device is housed in a 6-pin DIP package, designed for surface mount or through-hole applications depending on the specific variant configuration. It supports infrared soldering processes and complies with RoHS standards, ensuring environmental safety. The component operates within a specified temperature range suitable for general industrial and commercial electronic equipment.

Feature Summary

• Photovoltaic output configuration for high isolation voltage
• Infrared LED emitter compatible with standard reflow soldering
• RoHS compliant and lead-free construction
• Compact 6-pin dual in-line package design

Applications

• Signal isolation in communication interfaces
• Switching power supply feedback loops
• Microcontroller input/output isolation
• Industrial control system signal transfer

Procurement Notes

Verify the exact pinout and package dimensions against the official datasheet before integration, as variations may exist between tape-and-reel and tube packaging formats. Confirm compliance requirements such as RoHS and REACH status with the supplier to ensure alignment with target market regulations. Check for any specific handling instructions related to moisture sensitivity levels if applicable to the production environment.

Selection Notes

Select this component when high isolation voltage is required without the need for a transistor or logic gate output. Consider the forward current requirements of the internal LED and the open-circuit voltage capabilities of the photovoltaic detector. Ensure the operating temperature range meets the application's environmental conditions. Evaluate the package type compatibility with existing PCB assembly processes.

Part Context

This part belongs to the 4N2x series of optoisolators from Everlight, which are widely used for basic signal isolation tasks. The series typically includes variants like 4N25, 4N26, and 4N27, differing mainly in their output configurations (phototransistor vs. photovoltaic). The 4N28 specifically utilizes a photovoltaic output, offering zero bias operation and high isolation characteristics compared to transistor-output counterparts.

Replacement Considerations

Potential substitutes include other photovoltaic optocouplers from manufacturers such as Vishay (e.g., PC123 series) or Broadcom (e.g., HCPL-2600 series), provided they match the 6-pin DIP form factor and isolation voltage ratings. Always verify pin compatibility and electrical parameters before substitution.