CNY17F4300

Overview

The CNY17F4300 is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor. It integrates a Gallium Arsenide infrared emitting diode with an NPN phototransistor in a 6-DIP package. The device provides high isolation voltage of 5300 Vrms and supports through-hole mounting. Key electrical parameters include a minimum collector-emitter breakdown voltage of 70 V, a maximum forward current of 100 mA, and a typical current transfer ratio of 160%. It operates within a temperature range of -55°C to 100°C.

Feature Summary

• Integrates a Gallium Arsenide IRED with an NPN phototransistor for signal transmission
• Provides high electrical isolation between input and output circuits
• Designed for through-hole mounting in standard DIP-6 packages

Applications

• General purpose signal isolation in industrial control systems
• Power supply feedback loops requiring galvanic isolation
• Microcontroller interface circuits for level shifting and protection

Procurement Notes

Verify the specific suffix '4300' against official Fairchild or onsemi datasheets to confirm binning specifications, as this often denotes a particular Current Transfer Ratio (CTR) grade. Ensure the component is sourced from authorized distributors to guarantee authenticity, given the acquisition of Fairchild by onsemi. Check RoHS compliance status and lead-free markings on the package body. Confirm package dimensions match the required PCB footprint before ordering.

Selection Notes

Select this component when a robust, low-cost transistor output optocoupler is needed for digital signal isolation. The 5300 Vrms isolation rating suits applications with significant potential differences between ground domains. Consider the 160% typical CTR for efficient drive requirements. Verify that the 70V collector-emitter voltage meets the load requirements. The DIP-6 package is suitable for prototyping and low-volume manufacturing where surface mount space is not constrained.

Part Context

The CNY17 series is a widely used family of optocouplers originally developed by Fairchild Semiconductor. Following the acquisition of Fairchild by onsemi, these parts are now managed under the onsemi portfolio. The CNY17F4300 represents a specific binning variant within this series, distinguished by its CTR characteristics. This series is known for reliability in general-purpose isolation tasks across various electronic industries.

Replacement Considerations

Direct replacements may include other CNY17 variants such as CNY17F3W or CNY17F2W, depending on the required CTR bin. Verify pinout compatibility and isolation voltage ratings. Cross-reference with onsemi's current product lineup for updated packaging or environmental compliance information.