PS2811-4

Overview

The PS2811-4 is a four-channel optocoupler featuring an NPN silicon phototransistor output and a GaAs LED input. It provides 2500Vrms isolation voltage and operates with a maximum forward current of 50mA per channel. The device supports a collector-emitter voltage of 40V and delivers up to 40mA output current per channel. Typical current transfer ratio is 200% at 1mA input, with switching times of 4µs rise and 5µs fall.

Feature Summary

• Four independent channels for multi-signal isolation
• High current transfer ratio for efficient signal coupling
• Low input current requirements for power efficiency
• Robust 2500Vrms insulation barrier

Applications

• Industrial communication interface isolation
• Power supply feedback loops
• Microcontroller I/O isolation
• Signal transmission in noisy environments

Procurement Notes

Verify the specific suffix (e.g., -A, -F3) against the manufacturer's datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required isolation voltage and pin configuration. Cross-reference Renesas or NEC documentation for exact electrical limits before integration.

Selection Notes

Select this component when multiple isolated channels are required in a compact form factor. The high CTR ensures reliable switching with minimal drive current. Verify that the 40V output voltage rating meets the load requirements. Consider thermal management if operating near maximum current limits across all four channels simultaneously.

Part Context

This device belongs to the PS2811 series of low-input-current, high-CTR photocouplers. Manufactured by Renesas Technology Corp (formerly NEC), it utilizes a plastic SSOP package. The series includes single-channel variants like the PS2811-1, offering scalable isolation solutions for digital signal transmission applications requiring galvanic separation.

Replacement Considerations

Check for direct substitutes such as PS2811-4-F3-A or PS2811-4-A. Verify pin compatibility and electrical parameters including CTR range and isolation voltage. Ensure the replacement maintains the same 16-pin SSOP footprint and NPN phototransistor output configuration.