PS2561-2

Overview

The PS2561-2 is a dual-channel transistor output optocoupler manufactured by CEL. It integrates a Gallium Arsenide (GaAs) infrared emitting diode and two NPN silicon phototransistors within a single package to provide electrical isolation. The device features a high isolation voltage rating of 5000 Vrms, ensuring robust signal transmission across isolated circuits. It operates with a standard DIP configuration suitable for through-hole mounting applications.

Feature Summary

• Dual-channel architecture providing independent signal isolation paths
• High dielectric strength between input and output terminals
• Integration of GaAs LED with NPN phototransistor arrays

Applications

• Industrial control systems requiring multi-channel isolation
• Power supply feedback loops
• Signal transmission in noisy environments

Procurement Notes

Verify the manufacturer origin carefully, as the PS2561 series was originally developed by NEC Electronics. Ensure the specific part number matches the required channel count and package type. Confirm compliance with relevant safety standards such as UL or VDE if required for your application. Check datasheet revisions for any changes in mechanical dimensions or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when dual-channel isolation is necessary within a compact footprint. Compare the collector-emitter breakdown voltage and current transfer ratio against system requirements. Ensure the operating temperature range aligns with the environmental conditions of the target application. Verify that the DIP package style fits the PCB layout constraints.

Part Context

This component belongs to the PS2561 series of optically coupled isolators. The series typically includes single, dual, and quad-channel variants. These devices are designed for general-purpose isolation tasks, offering a balance between performance and cost. The series is widely recognized in industrial and consumer electronics for reliable signal coupling.

Replacement Considerations

Check for direct equivalents from other manufacturers offering dual-channel transistor output optocouplers with similar isolation voltages. Verify pin compatibility and package dimensions to ensure seamless replacement without PCB redesign.