PS2502-4-A

Overview

The PS2502-4-A is a high-isolation Darlington output optocoupler manufactured by CEL. It features four independent channels in a single package, providing 5000 Vrms isolation voltage between input and output circuits. The device utilizes NPN photodarlington transistors for the output stage, offering high current transfer ratios suitable for driving loads directly. Key electrical specifications include a maximum collector-emitter saturation voltage of 1 V and a maximum collector current of 160 mA per channel. The unit operates within a temperature range of -55°C to +100°C and is housed in an SMD-DIP-16 package.

Feature Summary

• Four-channel configuration for compact multi-circuit isolation
• High isolation voltage rating of 5000 Vrms
• NPN photodarlington output structure for high gain
• Surface mount DIP-16 packaging for automated assembly

Applications

• Industrial control systems requiring multi-channel signal isolation
• Power supply feedback loops with galvanic separation
• Microcontroller interface circuits for noise immunity
• Solid-state relay driver applications

Procurement Notes

Verify component authenticity through authorized distributors as this part may be discontinued or subject to obsolescence notices. Confirm RoHS compliance status and specific suffix variations against the manufacturer's latest documentation before finalizing procurement orders. Ensure storage conditions meet specified humidity and temperature limits to maintain lead integrity.

Selection Notes

Select this component when multiple isolated channels are required in a single footprint. Consider the higher propagation delay inherent to Darlington outputs compared to standard transistor types. Evaluate thermal dissipation requirements given the power dissipation limits. Ensure the input forward current does not exceed maximum ratings to prevent LED degradation over time.

Part Context

This component belongs to the PS2502 series of high-isolation optocouplers produced by California Eastern Laboratories (CEL), now part of Renesas Electronics. The series is designed for robust industrial applications where reliable electrical isolation is critical. The four-channel variant consolidates multiple isolation barriers into one package, reducing board space compared to discrete single-channel solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify parametric equivalents such as the PS2502L-4-A or other quad-channel Darlington optocouplers with matching isolation and pinout configurations through official manufacturer cross-reference tools.