PS2845-4A-F3-A

Overview

The PS2845-4A-F3-A is a four-channel optically coupled isolator manufactured by CEL. It integrates GaAs light-emitting diodes with NPN silicon phototransistors to provide electrical isolation between input and output circuits. The device features a 12-pin ultra-shrink SOP package, classified as the world's smallest in its class for four channels. Key electrical specifications include a maximum collector-emitter voltage of 70V, an isolation voltage of 1500Vrms, and a current transfer ratio ranging from 100% to 400%. The component supports surface-mount technology and offers common mode transient immunity.

Feature Summary

• Four independent channels integrated into a single compact unit
• High insulation voltage capability for circuit protection
• Ultra-shrink small outline package design for space-constrained applications
• NPN silicon phototransistor output configuration

Applications

• Industrial automation control systems
• Measurement and testing equipment
• Power supply feedback loops
• Communication interface isolation

Procurement Notes

Verify the specific suffix F3-A against the manufacturer's datasheet to confirm pinout compatibility and lead frame material. Ensure the procurement source provides valid UL certification documentation if safety isolation is required for the end application. Cross-reference the part number with Renesas Technology Corp records, as they are the original designer, to guarantee authenticity and traceability of the CEL-manufactured components.

Selection Notes

Select this component when high channel density is required within a minimal footprint. The 1500Vrms isolation rating makes it suitable for noisy environments where galvanic isolation is critical. Consider the 70V collector-emitter voltage limit when designing output stages. Verify that the NPN transistor output type aligns with the logic levels and drive requirements of the receiving circuitry in the target system design.

Part Context

This component belongs to the PS2845 series of photocouplers, which are designed for general-purpose isolation. The PS2845-4A variant specifically addresses the need for multi-channel isolation in a reduced package size compared to standard SOP formats. It serves as a bridge between low-voltage control circuits and higher-voltage power sections, ensuring signal integrity while preventing ground loops and protecting sensitive electronics from voltage spikes.

Replacement Considerations

Direct replacements may include the PS2845-4B or PS2841-4A variants from the same family, provided pinouts and electrical characteristics match. Verify that any substitute maintains the 12-pin SOP form factor and equivalent isolation ratings. Consult official substitution guides to ensure compatibility with existing PCB layouts and thermal management requirements.