PS2501A-1-H-A

Overview

The PS2501A-1-H-A is a single-channel optically coupled isolator manufactured by CEL. It integrates a Gallium Arsenide (GaAs) infrared light-emitting diode with an NPN silicon phototransistor output. The device provides high isolation voltage of 5000Vrms and operates with a typical current transfer ratio ranging from 50% to 600% at a forward input current of 5mA. Electrical characteristics include a maximum output voltage of 70V, rise time of 3µs, and fall time of 5µs. It is housed in a standard 4-pin DIP package suitable for through-hole mounting.

Feature Summary

• Integrates GaAs LED and NPN silicon phototransistor for signal isolation
• Provides high dielectric isolation voltage between input and output circuits
• Features low input drive current requirements for efficient operation
• Offers high current transfer ratio for reliable switching performance

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Microcontroller interface circuits
• Signal transmission across isolated barriers

Procurement Notes

Verify the specific suffix H-A against official datasheets to confirm lead-free compliance and packaging details. Ensure the manufacturer designation aligns with current Renesas or CEL product lines as ownership transitions occur. Cross-reference pinouts and electrical limits with the latest published documentation before integration to avoid compatibility issues with existing designs.

Selection Notes

Select this component when high isolation voltage and moderate speed are required for single-channel applications. Consider the current transfer ratio range and output transistor saturation voltage for load driving capabilities. Verify that the DIP package form factor fits the PCB layout constraints and that the operating temperature range meets environmental specifications.

Part Context

This part belongs to the PS2501 series of single-channel optocouplers originally developed by NEC and later produced by CEL and Renesas. The series is widely recognized for its reliability in industrial environments. The PS2501A-1 variant specifically denotes the A-speed grade with defined timing parameters, distinguishing it from faster or slower variants within the same family.

Replacement Considerations

Direct substitutes include PS2501A-1-F3-E and PS2501AL-1-F3-E from Renesas. Verify pinout compatibility and electrical parameter equivalence before substitution. Generic replacements may differ in isolation voltage or current transfer ratio, requiring circuit re-evaluation.