PS2502-4X

Overview

The PS2502-4X is a high-density, four-channel photodarlington optically coupled isolator manufactured by Isocom Components. It features a DC input and NPN photodarlington output configuration housed in a 16-pin DIP package. The device provides an isolation voltage of 5000Vrms with a minimum current transfer ratio of 200% at 1mA forward current. Key electrical parameters include a maximum collector-emitter saturation voltage of 1V, a peak forward current of 80mA, and a typical rise/fall time of 100µs. It operates within a temperature range of -55°C to 100°C.

Feature Summary

• Four independent channels for high-density mounting applications
• High isolation voltage capability for robust circuit protection
• Darlington transistor output structure for high gain
• Standard industry pinout compatibility

Applications

• Logic-to-logic isolation in noisy environments
• Line receiver circuits
• Programmable current level sensors
• Motor and servo machine digital control

Procurement Notes

Verify the specific suffix 'X' against official manufacturer documentation to confirm packaging details and compliance status. Ensure the component meets required safety certifications such as UL or VDE for your specific application context. Cross-reference datasheet revisions to confirm parameter consistency before finalizing procurement specifications.

Selection Notes

Select this component when high channel density and high current transfer ratio are required in a standard DIP footprint. The Darlington output offers significant gain but results in slower switching speeds compared to single-transistor outputs. Evaluate thermal management requirements given the operating temperature range and power dissipation characteristics during continuous operation.

Part Context

This part belongs to the PS2502 series of high isolation voltage Darlington transistor type multi photocouplers. Originally developed by NEC and now produced by various manufacturers including Isocom, these components are designed for general-purpose isolation where high gain is prioritized over speed. The series is widely recognized for its reliability in industrial control systems.

Replacement Considerations

Direct substitutes include PS2502-1-A, PS2502-2-A, and PS2502-3-A from Renesas Electronics for different channel counts. Generic equivalents may be available from other manufacturers producing standard PS2502-compatible parts, provided pinouts and electrical ratings match exactly.