PS2501AL-1-W-A

Overview

The PS2501AL-1-W-A is a single-channel optically coupled isolator manufactured by CEL. It integrates a Gallium Arsenide (GaAs) infrared emitting diode with an NPN silicon phototransistor to provide electrical isolation between input and output circuits. The device features a high isolation voltage rating of 5000Vrms, ensuring robust signal transmission in electrically noisy environments. It is housed in a compact 4-SMD surface mount package designed for lead bending, facilitating automated assembly and space-constrained PCB layouts.

Feature Summary

• Integrates GaAs LED and NPN phototransistor for efficient optical coupling
• Provides high dielectric isolation voltage for noise immunity
• Utilizes surface mount package design for automated processing

Applications

• Power supply control circuits
• Telephone and fax equipment interfaces
• Factory automation systems
• Office automation equipment

Procurement Notes

Verify the specific suffix configuration against official datasheets, as variations such as -F3 or -E3 may indicate different packaging formats like tape and reel versus tube. Confirm current availability status, as this specific variant may be discontinued or subject to lifecycle changes. Ensure compatibility with existing footprint designs before finalizing procurement orders.

Selection Notes

Select this component when a single-channel transistor output isolator is required for low-speed digital signal transmission. Consider the 5000Vrms isolation rating for safety compliance in mains-connected applications. Evaluate the surface mount package type against board space constraints and assembly capabilities. Verify that the NPN phototransistor output characteristics meet the load requirements of the destination circuit.

Part Context

This part belongs to the NEPOC series of high-isolation voltage photocouplers. It shares functional similarities with the PS2501A-1 but differs in package style, utilizing a lead-bending SMD form factor instead of a plastic DIP. The series is designed for general-purpose isolation tasks requiring reliable performance and compact dimensions.

Replacement Considerations

Direct substitutes include the PS2501AL-1-F3-W-A. Verify pinout compatibility and electrical parameters before substitution. Check for equivalent isolation ratings and package dimensions to ensure mechanical fit.