PS2502L-4-A

Overview

The PS2502L-4-A is a surface-mount, four-channel transistor output optocoupler manufactured by CEL (Renesas). It integrates a GaAs infrared LED with NPN photodarlington arrays to provide electrical isolation. Key electrical parameters include a maximum collector-emitter voltage of 40 V, a minimum current transfer ratio of 200%, and an insulation voltage of 5000 Vrms. The device operates within a temperature range of -55°C to +100°C and features a rise time of 100 µs and fall time of 100 µs.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using optical coupling technology.
• Integrates four independent channels in a single compact surface-mount package for space-constrained designs.
• Utilizes NPN photodarlington outputs to achieve high current transfer ratios for efficient signal transmission.

Applications

• Industrial automation control systems requiring multi-channel isolation
• Solid-state relay driver circuits
• Microprocessor interface circuits for noise immunity

Procurement Notes

Verify the specific suffix and manufacturer designation carefully, as this component is associated with both CEL and Renesas Electronics due to corporate acquisition history. Confirm availability status, as some distributors list this part as discontinued or limited stock. Ensure the selected variant matches the required pinout and packaging specifications for your PCB layout.

Selection Notes

Select this component when multiple isolated channels are required in a small footprint. The photodarlington output offers higher gain than standard phototransistors but exhibits slower switching speeds compared to logic-output isolators. Verify that the 40 V collector-emitter voltage rating meets the load requirements of the application circuit.

Part Context

This part belongs to the PS2502L series of micro-small package optocouplers. The '4' indicates a quad-channel configuration, while 'L' typically denotes the lead-free or specific packaging variant. It serves as a multi-channel alternative to single-channel devices like the PS2502L-1, consolidating isolation functions into one component.

Replacement Considerations

Direct substitutes may include other quad-channel darlington optocouplers from manufacturers such as Broadcom or Vishay. Verify compatibility regarding pin assignments, insulation voltage ratings, and current transfer ratio specifications before substitution.