PS2911-1-F3-K-A

Overview

The PS2911-1-F3-K-A is a single-channel transistor output optocoupler manufactured by CEL. It features a 4-pin ultra-small flat-lead package designed for high-density applications. The device provides an isolation voltage of 2500Vrms between input and output circuits. Key electrical specifications include a minimum Current Transfer Ratio (CTR) of 200% at a forward current of 1mA, with a maximum CTR of 400% under the same conditions. The output transistor supports a maximum collector-emitter voltage of 40V and can handle an output current of 40mA per channel.

Feature Summary

• High current transfer ratio ensuring reliable signal transmission in low drive current scenarios
• Compact 4-pin flat-lead package optimized for space-constrained printed circuit board layouts
• Robust 2500Vrms insulation voltage providing effective galvanic isolation between control and load circuits

Applications

• Industrial automation control systems requiring isolated signal interfaces
• Power supply feedback loops for voltage regulation and monitoring
• Microcontroller peripheral isolation to protect logic circuits from high-voltage noise

Procurement Notes

Verify component status carefully as listings indicate this specific part number may be obsolete or discontinued by major distributors. Confirm availability through authorized channels or check for active equivalents if production continuity is required. Ensure the suffix matches exact packaging and specification requirements before ordering.

Selection Notes

Select this component when high CTR is critical for driving subsequent stages with minimal input current. The small form factor makes it suitable for dense PCB designs where standard DIP packages are too large. Verify that the 40V output voltage rating meets the load requirements of the target application circuit.

Part Context

This device belongs to the PS2911 family of ultra-small photocouplers from CEL. These components are engineered for applications demanding high reliability and compact size. The family typically includes variants with different pin configurations and packaging options to suit various mounting styles and isolation voltage requirements.

Replacement Considerations

Public sources list parametric equivalents but do not confirm specific substitute part numbers for this obsolete item. Consult manufacturer documentation for direct replacements or verify compatibility with alternative high-CTR transistor output optocouplers offering similar isolation ratings.