PS2502-4SM

Overview

The PS2502-4SM is a high-density surface-mount photodarlington optocoupler manufactured by Isocom Components. It integrates four independent channels, each comprising an infrared emitting diode and an NPN silicon Darlington phototransistor output. The device provides electrical isolation between input and output circuits, featuring a hermetic ceramic flat pack package with gold-plated terminals for enhanced reliability. Key electrical parameters include a maximum insulation voltage of 5000 Vrms, a typical current transfer ratio of 200%, and a collector-emitter breakdown voltage of 40 V. It operates within a temperature range of -55 °C to 125 °C.

Feature Summary

• Integrates four isolated channels in a single compact surface-mount package
• Utilizes NPN silicon Darlington phototransistor outputs for high gain
• Provides robust electrical isolation via ceramic construction
• Features gold-plated terminals for corrosion resistance and reliable contact

Applications

• Programmable logic controllers
• Power supply units
• Industrial automation systems

Procurement Notes

Verify the specific manufacturer source, as this part number is historically associated with NEC/Renesas but distributed by Isocom. Confirm that the 'SM' suffix denotes the correct surface-mount variant and that the unit meets required RoHS compliance standards. Ensure the package type matches the design footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when multiple isolated channels are required in a space-constrained surface-mount application. The Darlington output configuration offers higher current drive capability compared to standard transistor outputs. Consider the operating temperature range and isolation voltage requirements to ensure compatibility with the target circuit environment and safety standards.

Part Context

Isocom Components distributes high-reliability optocouplers, often serving as a source for legacy or specialized components no longer produced by original manufacturers. The PS2502 series is a well-established family of Darlington output isolators known for high current transfer ratios. This specific four-channel variant allows for significant board space reduction in multi-channel signal isolation designs.

Replacement Considerations

PS2502L-4-A

FAQ

What is the typical current transfer ratio for this device?

The typical current transfer ratio is 200%.

Does this component support surface-mount technology?

Yes, the SM suffix indicates it is designed for surface-mount installation.