PS2501L-4-A

Overview

The PS2501L-4-A is a surface-mount transistor output optocoupler manufactured by CEL. It features four channels within a single package, providing electrical isolation between input and output circuits. The device integrates a Gallium Arsenide (GaAs) infrared emitting diode with an NPN silicon phototransistor array. Key electrical specifications include a maximum collector-emitter voltage of 80 V, a continuous collector current of 50 mA per channel, and an isolation voltage rating of 5000 Vrms. The unit operates within a temperature range of -55°C to +100°C.

Feature Summary

• Contains four independent channels for multi-circuit isolation in a compact form factor
• Utilizes GaAs LED and NPN phototransistor technology for reliable signal transmission
• Designed for surface-mount installation to facilitate automated PCB assembly

Applications

• Multi-channel data bus isolation
• Industrial control system signal interfacing
• Power supply feedback loop isolation

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's latest documentation to confirm pinout orientation and tape-and-reel packaging specifications. Ensure the procurement source provides valid RoHS compliance certificates. Cross-reference the part number with official CEL distributors to confirm current availability status, as surface-mount variants may have different lead times compared to through-hole equivalents.

Selection Notes

Select this component when multiple isolated channels are required in a space-constrained design. The surface-mount package reduces board footprint compared to discrete solutions. Verify that the application voltage does not exceed the 80 V collector-emitter limit. Consider the thermal management requirements for high-density SMT layouts operating near the upper temperature limit.

Part Context

This part belongs to the PS2501 family of optocouplers produced by CEL. The 'L' designation typically indicates a surface-mount variant, while '-4' specifies the quad-channel configuration. This series is widely used in applications requiring robust galvanic isolation between low-voltage logic circuits and higher-voltage power stages.

Replacement Considerations

Direct replacements include other quad-channel SMT optocouplers from manufacturers such as Broadcom or Vishay. Verify that substitute parts match the 5000 Vrms isolation rating and 50 mA output current capability. Check for compatible DIP-to-SMT pinout mappings if retrofitting existing designs.