4N25S(TA)-V

Overview

The 4N25S(TA)-V is a single-channel phototransistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an infrared emitting diode coupled to a phototransistor with a base lead for sensitivity control. The device provides electrical isolation with a rated insulation voltage of 5000 Vrms. It is housed in a surface-mount 6-SMD package and is designed for applications requiring signal transmission across isolated circuits.

Feature Summary

• Integrates an infrared LED emitter with a phototransistor output featuring a base terminal for external biasing or speed adjustment.
• Provides high-voltage electrical isolation between input and output circuits to protect sensitive components.
• Utilizes a compact surface-mount form factor suitable for automated assembly processes.

Applications

• Industrial automation systems requiring signal isolation
• IoT device interface circuits
• General-purpose digital signal transmission

Procurement Notes

Verify the specific suffix designation, as variants such as -V may indicate distinct packaging or testing configurations compared to standard versions. Confirm current availability status, as supply conditions for this component type can be restricted. Ensure compatibility with existing PCB footprints and reflow soldering profiles before finalizing procurement decisions.

Selection Notes

Select this component when a surface-mount solution is required for galvanic isolation in low-speed digital applications. The presence of a base pin allows for customization of switching speed and current transfer ratio via external resistors. Evaluate thermal management requirements and ensure the operating temperature range aligns with the system environment.

Part Context

This part belongs to the 4N2X series of phototransistor optocouplers from Everlight. The series includes various packages and suffixes, such as DIP and SMD options. The 4N25S(TA)-V specifically denotes the surface-mount variant with tape-and-reel or cut-tape packaging options, distinguishing it from through-hole equivalents like the 4N25.

Replacement Considerations

Compatible substitutes include the 4N25S(TA) and 4N25S1(TA)-V. Verify that alternative parts match the 6-SMD footprint and maintain equivalent isolation voltage ratings. Cross-reference datasheets to confirm pinout compatibility and electrical characteristics before implementation.