PS2503-1-L-A

Overview

The PS2503-1-L-A is an optically coupled isolator manufactured by CEL, belonging to the NEPOC series. It integrates a Gallium Arsenide (GaAs) light-emitting diode with an NPN silicon phototransistor within a single package. The device provides electrical isolation between input and output circuits via optical transmission. Key electrical specifications include a maximum collector-emitter saturation voltage of 250mV and typical rise/fall times of 20µs and 30µs, respectively. It operates within a temperature range of -55°C to 100°C.

Feature Summary

• Optical isolation using GaAs LED and NPN phototransistor
• High operating temperature capability up to 100°C
• Low saturation voltage for efficient switching

Applications

• Signal isolation in data acquisition systems
• Interface between microcontrollers and high-voltage loads
• Noise immunity in industrial control circuits

Procurement Notes

Verify the specific suffix 'L' against the manufacturer's current datasheet, as it may indicate lead-free compliance or specific packaging variations. Confirm availability status, as some distributors list this variant as discontinued or limited stock. Ensure the ordering part number matches the exact pinout and isolation voltage requirements of your design.

Selection Notes

Select this component when low saturation voltage and moderate speed are required for digital signal isolation. Compare the 250mV Vce(sat) against other optocouplers if low power dissipation on the output side is critical. Verify that the 20µs/30µs response times meet the system's timing constraints for signal integrity.

Part Context

This part belongs to the PS2503 family of optocouplers from CEL, designed for general-purpose isolation. It shares architectural similarities with the PS2503-1 but may differ in environmental compliance or reel packaging due to the 'L' suffix. It serves as a discrete solution for galvanic isolation in compact PCB layouts.

Replacement Considerations

The Renesas PS2503L-1-A is listed as a similar substitute. Verify pin compatibility and electrical parameters before swapping. Check if the substitute offers equivalent isolation voltage and current transfer ratio to ensure circuit functionality remains unchanged.