CNY17F4M

Overview

The CNY17F4M is a single-channel, through-hole phototransistor optocoupler from onsemi’s CNY series. It integrates a gallium arsenide infrared emitting diode with an NPN phototransistor in a 6-pin MDIP package. Key electrical parameters include a maximum forward voltage of 1.65V and a collector-emitter saturation voltage of 400mV. The device supports a maximum input current of 60mA and a maximum collector current of 50mA, with a collector-emitter voltage rating of 70V. It offers a high isolation voltage of 7500V AC (or 4170 Vrms) and operates within a temperature range of -40°C to 100°C.

Feature Summary

• Provides galvanic isolation between input and output circuits using an infrared LED and NPN phototransistor pair.
• Features a standard 6-pin MDIP through-hole package for reliable PCB mounting.
• Delivers high current transfer ratio performance for efficient signal transmission.
• Complies with international safety standards including EN, IEC, and UL certifications.

Applications

• General-purpose digital signal isolation in industrial control systems
• Power supply feedback loops for voltage regulation
• Microcontroller interface circuits requiring electrical separation

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as CNY17F4VM may indicate different packaging formats like bulk or tube while maintaining identical electrical characteristics. Confirm that the required isolation voltage rating aligns with your system's safety requirements, noting potential discrepancies between AC peak ratings and RMS values across different datasheet editions. Ensure the chosen component meets all relevant regional certification standards for your final application.

Selection Notes

Select this component when a robust, cost-effective solution for low-speed digital isolation is required. The NPN phototransistor output is suitable for interfacing with standard logic families. Consider the 6μs rise time and 24μs fall time when designing for higher frequency applications, as these limits define the maximum switching speed. The wide operating temperature range makes it appropriate for environments with significant thermal fluctuations.

Part Context

This part belongs to the CNY17 family of optocouplers, which are widely used for general-purpose isolation tasks. The CNY17 series is known for its reliability and compliance with major global safety standards. The 'F4' designation typically refers to the specific binning of the Current Transfer Ratio (CTR), ensuring consistent performance across production batches compared to standard unbin parts.

Replacement Considerations

Direct substitutes include other CNY17 variants with compatible pinouts and electrical ratings. Verify that any replacement maintains the same 6-pin DIP configuration and NPN output type. Check if alternative manufacturers offer equivalent devices with matching isolation voltages and current transfer ratios to ensure seamless integration without circuit redesign.