PS2805A-1-A

Overview

The PS2805A-1-A is a single-channel transistor output optocoupler manufactured by Renesas Electronics. It features an NPN phototransistor output and operates within a temperature range of -55°C to +100°C. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a forward current of 30 mA, and an isolation voltage of 2500 Vrms. The device utilizes an SSOP-4 surface-mount package with a power dissipation rating of 60 mW.

Feature Summary

• Provides high-voltage isolation between input and output circuits for signal transmission
• Integrates a shielded plastic SSOP package to block ambient light interference
• Utilizes GaAs LED and silicon phototransistor technology for reliable optical coupling

Applications

• AC input interface circuits in industrial control systems
• Signal isolation in measurement and testing equipment
• Power supply feedback loops requiring galvanic separation

Procurement Notes

Verify the component status as Not Recommended for New Designs (NRND) before procurement. Confirm that existing inventory meets long-term supply requirements. Ensure the SSOP-4 package dimensions align with the target PCB footprint. Validate RoHS compliance documentation against specific regional regulatory standards. Check for any product change notices affecting pinout or electrical characteristics.

Selection Notes

Select this component when a single-channel isolation solution with moderate speed is required. The 70 V collector-emitter voltage suits low-voltage logic interfacing. Consider the 2500 Vrms isolation rating for safety-critical applications. Evaluate the 5 µs rise time against system switching frequency requirements. Compare thermal performance within the constrained SSOP-4 package for dense layouts.

Part Context

This part belongs to the PS2805A series of high-isolation optocouplers designed for AC input applications. It shares architectural similarities with other members like the PS2805A-4-A but differs in channel count and package size. The series emphasizes compactness and reliability for general-purpose isolation tasks in consumer and industrial electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.