K817P9

Transistor, Photovoltaic Output Optoisolators Overview

The K817P9 is a phototransistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It provides electrical isolation between input and output circuits using an infrared LED and a phototransistor. The device features a single channel with a high isolation voltage rating of 5000Vrms. It is housed in a standard 4-DIP package, suitable for through-hole mounting. Key electrical parameters include a current transfer ratio (CTR) range of 200% to 400%, ensuring reliable signal transmission across the isolation barrier while maintaining safety compliance.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation between control and power circuits
• Utilizes phototransistor output for signal detection
• High insulation voltage rating for safety applications
• Standard 4-DIP package for easy integration

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems
• Power supply feedback loops
• Signal isolation in communication interfaces
• Microcontroller input/output isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific datasheet version from Vishay to confirm exact CTR ranges and insulation ratings. Ensure the 4-DIP package matches your PCB footprint requirements. Check for any recent updates to safety certifications or RoHS compliance status before finalizing procurement decisions.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Consider the CTR range of 200-400% when designing biasing circuits to ensure adequate signal margin. Evaluate the isolation voltage requirement against system safety standards. The phototransistor output type is suitable for digital signal switching rather than analog linear applications due to its non-linear characteristics.

Transistor, Photovoltaic Output Optoisolators Part Context

The K817P9 belongs to the K817 series of optocouplers from Vishay. This series is designed for general-purpose isolation applications where cost-effective and reliable performance is required. The P9 suffix typically denotes specific binning or packaging variations within the broader K817 family, focusing on standard DIP configurations.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Compatible substitutes may include other Vishay K817 series variants with similar pinouts and electrical characteristics. Cross-reference with equivalent parts from other manufacturers offering phototransistor output optocouplers in 4-DIP packages, ensuring matching isolation voltage and CTR specifications.