PS2561L-1-V

Overview

The PS2561L-1-V is a single-channel transistor output optocoupler manufactured by CEL, part of the PS2561L series. It integrates a Gallium Arsenide (GaAs) infrared emitting diode and an NPN silicon phototransistor within a surface-mount DIP-4 Gull Wing package. The device provides high isolation voltage of 5000 Vrms between input and output. Key electrical parameters include a maximum collector-emitter voltage of 80 V, a maximum collector current of 50 mA, and a power dissipation of 150 mW. The forward current rating is 80 mA with a typical forward voltage of 1.4 V. The unit operates within a temperature range of -55°C to +100°C.

Feature Summary

• High isolation voltage capability for safe signal transmission across potential differences
• Surface-mount gull-wing lead configuration for automated PCB assembly
• Integration of GaAs LED and NPN phototransistor for efficient optical coupling

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Signal transmission in noisy environments

Procurement Notes

Verify the manufacturer designation carefully, as this component is historically associated with NEC/Renesas. Ensure the specific suffix matches the required lead form and insulation standards. Confirm RoHS compliance status through official documentation before integration. Check for end-of-life or not-recommended-for-new-designations which may impact long-term availability.

Selection Notes

Select this component when surface-mount technology is required for high-isolation applications. The 80V collector-emitter voltage and 50mA collector current suit moderate load switching. Verify that the 80mA forward current requirement aligns with the driving circuit capabilities. Consider the thermal management requirements given the 150mW power dissipation limit in enclosed spaces.

Part Context

This component belongs to the PS2561L family of high-isolation voltage photocouplers. The 'L' designation typically indicates a lead-bending type suitable for surface mounting, distinguishing it from standard DIP variants. The series is designed for cost-effective isolation in various electronic circuits, maintaining compatibility with traditional through-hole performance metrics while enabling modern SMT processes.

Replacement Considerations

Direct replacements include PS2561L-1-E3-A or PS2561BL-1-A from Renesas, provided pinout and electrical ratings are verified. Cross-reference with other manufacturers offering similar 5000Vrms isolated transistor outputs in SOP-4 packages. Ensure any substitute maintains the same CTR range and switching speed characteristics.