CNY17F4300

Overview

The CNY17F4300 is a single-channel phototransistor output optocoupler manufactured by onsemi. It features an infrared emitting diode coupled to an NPN phototransistor in a surface-mount SMD-DIP-6 package. The device provides electrical isolation with a rated insulation voltage of 5300 Vrms. Key electrical parameters include a maximum collector-emitter voltage (Vceo) of 70 V, a maximum collector current (Ic) of 50 mA, and a typical forward voltage (Vf) of 1.65 V at the specified forward current. The unit operates within a temperature range of -55°C to +100°C.

Feature Summary

• Provides galvanic isolation between input control circuits and output load circuits using optical transmission.
• Integrates an infrared LED emitter with an NPN phototransistor for signal transfer.
• Designed for surface-mount assembly using a compact SMD-DIP-6 footprint.

Applications

• Signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Switching applications in power supply feedback loops

Procurement Notes

Verify the specific suffix '00' against official manufacturer documentation to confirm pinout compatibility and package dimensions. Ensure the selected variant meets the required insulation voltage ratings for the target application safety standards. Cross-reference datasheet revisions to confirm material compliance and manufacturing origin details prior to final procurement decisions.

Selection Notes

Select this component when a surface-mount solution is required for low-speed digital isolation. Compare the 5300 Vrms isolation rating against system safety requirements. Evaluate the 70 V collector-emitter voltage limit to ensure it accommodates the output circuit's maximum operating voltage. Consider the SMD-DIP-6 package constraints regarding PCB real estate and thermal dissipation capabilities during the design phase.

Part Context

This part belongs to the CNY17 series of transistor-output optocouplers from onsemi. The series is widely recognized for general-purpose isolation tasks. The CNY17F4300 specifically denotes the surface-mount version, distinguishing it from through-hole variants like the CNY17F4M. It serves as a standard component for basic signal coupling where high-speed performance is not the primary requirement.

Replacement Considerations

Direct replacements may include other CNY17 series surface-mount variants such as CNY17F43S, provided the pinout and electrical specifications match. Verify that substitute components maintain equivalent isolation voltage and current transfer ratio characteristics to ensure circuit functionality remains unchanged.