PS2561AL-1-E3-A

Overview

The PS2561AL-1-E3-A is a single-channel transistor output optocoupler manufactured by CEL. It integrates a Gallium Arsenide (GaAs) infrared emitting diode and an NPN silicon phototransistor within a surface-mount plastic package. The device provides high isolation voltage of 5000 Vrms, ensuring robust electrical separation between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 70 V, a maximum forward current of 30 mA, and a nominal current transfer ratio of 200%. The component operates within a temperature range of -55 °C to 100 °C and features a maximum dark power supply of 100 nA.

Feature Summary

• Integrates GaAs LED and NPN silicon phototransistor for signal isolation
• Provides high insulation voltage capability for safety compliance
• Surface mount construction with lead-free composition

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Signal transmission across isolated ground planes

Procurement Notes

Verify the specific suffix 'E3' confirms lead-free status as documented in official datasheets. Confirm that the manufacturer designation aligns with CEL specifications rather than generic family listings. Ensure the ordering number matches the exact surface mount variant required for the target PCB footprint. Cross-reference safety approvals such as UL recognition if regulatory compliance is mandatory for the end application.

Selection Notes

Select this component when a single-channel transistor output is required for low-speed signal isolation. Consider the 70 V collector-emitter breakdown voltage limit for circuit design margins. Evaluate the 200% typical current transfer ratio against the driving requirements of the downstream load. Verify that the surface mount package dimensions fit the available board space constraints.

Part Context

This part belongs to the PS2561 series of photocouplers, which are designed for cost-effective isolation solutions. The AL-1 suffix typically denotes a gull-wing surface mount package variant. The E3 suffix indicates a lead-free product formulation compliant with environmental standards. This series is widely used in applications where reliable optical coupling between disparate voltage domains is necessary.

Replacement Considerations

Direct substitutes may include other single-channel transistor output optocouplers with comparable 5000 Vrms isolation ratings. Verify pinout compatibility and package dimensions before substitution. Check if alternative manufacturers offer equivalent current transfer ratios and breakdown voltages. Ensure any replacement maintains the same lead-free certification if required.