CNY75B

Overview

The CNY75B is a single-channel optoisolator featuring an NPN phototransistor output with a base terminal, housed in a 6-DIP package. It provides 5000Vrms isolation voltage between input and output circuits. The device supports a maximum collector current of 50mA and a collector-emitter voltage of 70V. Typical switching characteristics include rise and fall times of approximately 2.5µs and 2.7µs respectively. The current transfer ratio ranges from 100% to 200% at a forward current of 10mA. Operating temperature spans from -55°C to +110°C.

Feature Summary

• Integrates an infrared emitting diode with an NPN phototransistor for signal transmission
• Includes a dedicated base terminal on the phototransistor for improved switching speed control
• Provides high-voltage electrical isolation via plastic dual inline packaging

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits between microprocessors and power switching devices
• Solid-state relay driver applications requiring moderate speed

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific shipping configuration upon order placement. Review datasheet revisions for any updates to mechanical dimensions or electrical limits before finalizing design integration.

Selection Notes

Select this component when base-driven phototransistor outputs are required for faster response compared to standard variants. Ensure circuit design accommodates the specified 5000Vrms isolation rating. Verify that the 50mA collector current limit meets load requirements without exceeding thermal dissipation constraints within the operating temperature range.

Part Context

Part of the Vishay CNY75 series, which includes variants like CNY75A and CNY75G. These components share similar optical coupling structures but differ in current transfer ratio specifications and pinout configurations. The CNY75B specifically targets applications needing higher gain and base access for timing optimization.

Replacement Considerations

Direct substitutes include CNY75A and CNY75G, though current transfer ratios and pin assignments may vary. Verify compatibility with existing PCB footprints and ensure electrical parameters meet system isolation and speed requirements before substitution.