CNY17G-4

Overview

The CNY17G-4 is a single-channel transistor output optocoupler from Vishay, featuring an NPN phototransistor with base connection. It provides 5000 Vrms isolation voltage and operates within a temperature range of -55°C to +100°C. The device supports a maximum forward current of 60 mA and a collector current of 100 mA. Key electrical parameters include a typical forward voltage of 1.65 V, a collector-emitter saturation voltage of 300 mV, and rise/fall times of 2 µs. The Current Transfer Ratio (CTR) ranges from 160% to 320%, ensuring high efficiency for signal transmission.

Feature Summary

• Provides robust galvanic isolation between input and output circuits via an infrared LED and silicon NPN phototransistor pair.
• Features a built-in base terminal on the phototransistor to allow for external biasing or improved switching speed control.
• Delivers high current transfer efficiency with a CTR range of 160% to 320% under standard operating conditions.

Applications

• Industrial control systems requiring reliable signal isolation
• Solid-state relay driver circuits
• Microcontroller interface isolation for digital signals

Procurement Notes

Verify that the specific order matches the 'G' suffix variant, which denotes the 5000 Vrms insulation rating and PDIP-6 package configuration. Confirm that the required Current Transfer Ratio falls within the 160%-320% range specified for this part number. Ensure compatibility with through-hole mounting processes and check that the operating temperature range meets the application's thermal requirements.

Selection Notes

Select the CNY17G-4 when high isolation voltage and fast switching speeds are critical for the design. This model is suitable for applications demanding a wide CTR tolerance compared to standard variants. Consider the base pin availability if external circuit adjustments for gain or speed are necessary. Compare against lower-voltage rated alternatives if system constraints allow for reduced isolation requirements.

Part Context

This component belongs to the CNY17 series of transistor output optocouplers manufactured by Vishay Semiconductor Opto Division. The series is widely used in general-purpose isolation applications. The CNY17G-4 specifically differentiates itself with enhanced insulation capabilities and standardized binning for current transfer ratio, making it a common choice for replacing older legacy components in modern designs.

Replacement Considerations

Public confirmed substitute part numbers include CNY17-4X016 and CNY117-4. Verify pinout compatibility and electrical parameter overlaps before substitution.