CNY17-3 Optocoupler IC DIP 6 Package

CNY17-3 Optocoupler IC DIP 6 Package.

The CNY17-3 is a popular phototransistor-based optocoupler designed to provide electrical isolation between high-voltage and low-voltage circuits. It consists of an infrared LED and an NPN phototransistor, all enclosed in a 6-pin DIP package.
The “-3” grade indicates a medium-high Current Transfer Ratio (CTR), making it suitable for reliable signal transfer with moderate LED current.

It is widely used in power supplies, microcontroller interfacing, industrial controls, and protection circuits.

Click here to view the related products

Key Features

• High isolation voltage: typically 5 kV RMS
• Medium-high CTR: 100% to 200% (for CNY17 3)
• Phototransistor output
• Input-output isolation for safety
• Low input LED current requirement
• Wide operating temperature range
• Compatible with TTL, CMOS, and logic circuits
• Standard 6-pin DIP package
• Reliable and low-cost optocoupler

Advantages

• Strong isolation between high-voltage and low-voltage circuits
• Good CTR stability
• Easy to interface with microcontrollers
• Low EMI and noise interference
• Rugged and reliable for industrial use

Applications

• Power supply isolation
• Microcontroller input isolation
• AC mains signal monitoring
• Relay driver isolation
• Switch-mode power supply (SMPS) feedback
• Motor control circuits
• Industrial automation systems
• Signal isolation in noisy environments
• Triac triggering for AC loads
• Voltage level shifting with isolation

CNY17 Datasheet