PS2502-4G

Overview

The PS2502-4G is a high-density mounting photodarlington optically coupled isolator manufactured by Isocom Components. It integrates a GaAs light emitting diode and an NPN silicon darlington connected phototransistor within a single package. The device provides electrical isolation between input and output circuits, featuring a high current transfer ratio typical of 2000% and a high-speed switching capability with rise and fall times of 100 µs. It supports a maximum insulation voltage of 5000 Vrms and is available in plastic DIP configurations for through-hole mounting.

Feature Summary

• Integrates a GaAs LED with an NPN silicon Darlington phototransistor for high gain
• Provides high-voltage electrical isolation suitable for sensitive circuit protection
• Offers high current transfer ratio to drive loads with minimal input current
• Designed for high-density mounting applications in compact electronic assemblies

Applications

• Programmable logic controllers
• Power supply units
• Telephone and fax equipment
• Factory automation and office automation systems

Procurement Notes

Verify the specific suffix 'G' against official Isocom documentation to confirm RoHS compliance status or lead-free plating specifications. Ensure the package type matches the required PCB footprint, as variations exist between standard DIP and surface mount versions within the PS2502 family. Cross-reference datasheets from authorized distributors to confirm availability and exact pinout compatibility with existing designs.

Selection Notes

Select this component when high current gain is required to interface low-power control signals with higher load currents. The Darlington output structure allows for direct driving of relays or indicators without additional amplification stages. Consider the thermal management requirements associated with the Darlington configuration's higher saturation voltage compared to single transistor outputs.

Part Context

The PS2502 series represents a line of high-isolation voltage Darlington transistor type multi photocouplers originally established by NEC and now produced by various manufacturers including Isocom. This series is widely recognized for its reliability in industrial environments. The PS2502-4 variant specifically denotes a quad-channel configuration, providing four independent isolation channels within a single 16-pin package.

Replacement Considerations

Compatible substitutes include PS2502-1, PS2502-2, PS2502L-1, PS2502L-2, and PS2502L-4 from original manufacturers. Verify that replacement parts maintain the same Darlington output topology and insulation voltage ratings.