PS2561-1-V-A

Overview

The PS2561-1-V-A is a single-channel transistor output optocoupler manufactured by California Eastern Laboratories. It integrates a gallium arsenide infrared emitting diode and an NPN silicon phototransistor within a plastic dual in-line package. The device provides electrical isolation with a maximum insulation voltage of 5000 Vrms. Key electrical specifications include a collector-emitter breakdown voltage of 70 V, a nominal current transfer ratio of 50%, and a maximum forward current of 30 mA. The component operates reliably across a temperature range of -55 °C to +100 °C.

Feature Summary

• Integrates a GaAs light emitting diode and an NPN silicon phototransistor for optical signal transmission
• Provides high voltage isolation between input and output circuits
• Designed for surface mount or through-hole applications using a standard plastic DIP configuration

Applications

• Signal isolation in industrial control systems
• Interface circuits for microprocessors and logic devices
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'V-A' against manufacturer documentation to confirm pinout compatibility and lead finish specifications. Ensure that the procurement source provides valid traceability for the California Eastern Laboratories part number. Confirm that the component meets required safety certifications such as UL recognition before integration into certified end products.

Selection Notes

Select this component when a single-channel isolation interface with moderate current transfer capability is required. The 50% nominal current transfer ratio suits applications where precise linear response is not critical. Consider the 70 V collector-emitter breakdown limit for low-voltage switching tasks. Verify thermal management requirements given the 100 °C maximum operating temperature rating.

Part Context

This part belongs to the PS2561 series of single transistor type photocouplers. The series includes variants with different package types such as lead bending L1 and L2 configurations. The base model PS2561-1 represents the standard plastic DIP form factor. Variants like PS2561AL2-1 offer surface mount alternatives within the same functional family.

Replacement Considerations

Public data indicates that the PS2561-1 series may be obsolete. Potential substitutes include Renesas or NEC equivalents such as the PS2561A-1 or PS2561L-1. Verify pin compatibility and electrical parameters before substitution.