PS2911-1-A

Overview

The PS2911-1-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 compact four-pin SSOP package. The device provides electrical isolation with a rated insulation voltage of 2500 Vrms. Key electrical parameters include a collector-emitter saturation voltage of 300 mV maximum, a forward voltage of 1.3 V, and a power dissipation rating of 160 mW. The unit supports a maximum collector current of 40 mA and operates within a temperature range of -55°C to +100°C.

Feature Summary

• Integrates a GaAs LED and NPN phototransistor for high-density mounting
• Provides robust electrical isolation via 2500 Vrms insulation voltage
• Features ultra-small four-pin flat lead package design

Applications

• Industrial control systems requiring signal isolation
• Measurement equipment input stages
• Power supply feedback loops

Procurement Notes

Verify the specific suffix 'A' against official CEL documentation to confirm pinout and electrical tolerances. Confirm RoHS compliance status through the manufacturer's current datasheet. Check part availability as older revisions may be subject to discontinuation or lifecycle changes. Ensure the ordering code matches the required package variant exactly.

Selection Notes

Select this component when a compact form factor is required for single-channel isolation. The high current transfer ratio makes it suitable for driving logic inputs directly. Verify that the 40 V collector-emitter voltage rating meets the circuit requirements. Consider the thermal performance given the 160 mW power dissipation limit in enclosed spaces.

Part Context

This component belongs to the PS2911 series of optically coupled isolators. The series is characterized by its small footprint and high current transfer ratio capabilities. It is designed for applications where space constraints and signal integrity are critical. The technology utilizes standard silicon phototransistor and GaAs LED materials for reliable operation.

Replacement Considerations

Direct substitutes include PS2911-1-F3 and PS2911-1-L-A from CEL. Verify pin compatibility and electrical specifications before substitution. Other manufacturers offer equivalent single-channel transistor output optocouplers in SSOP-4 packages.