FOD817D3S

Overview

The FOD817D3S is a single-channel transistor output optocoupler manufactured by onsemi, designed for surface-mount applications in a compact 4-SMD package. It features an NPN phototransistor output capable of handling a maximum collector current of 50 mA and a collector-emitter voltage of 70 V. The device provides robust electrical isolation with a rated insulation voltage of 5000 Vrms. Key performance metrics include a minimum current transfer ratio of 300% and a maximum of 600%, ensuring reliable signal transmission. Typical rise and fall times are both 18 µs, supporting moderate-speed digital switching. The component operates within a wide temperature range from -55°C to +110°C and dissipates up to 200 mW of power.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using a phototransistor configuration.

Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic devices
• Power supply feedback loops requiring galvanic separation

Procurement Notes

Verify the specific suffix '3S' against official onsemi documentation to confirm the exact tape-and-reel packaging specifications and quantity per reel. Ensure that the selected variant matches the required surface-mount footprint and thermal characteristics for the target PCB design. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component when a surface-mount solution is required for single-channel isolation with high current transfer ratio requirements. The 4-SMD package offers space efficiency compared to through-hole alternatives. Consider the 18 µs switching speed limitations for high-frequency applications. Verify that the 5000 Vrms isolation rating meets the safety standards of the end application environment.

Part Context

This part belongs to the FOD817 series, which includes various configurations such as through-hole MDIP packages and different current transfer ratio grades (A, B, C, D). The '3S' suffix typically denotes a specific packaging format, often tape and reel, distinguishing it from tube-packaged variants like the FOD817D. It shares core electrical characteristics with other members of the family but differs in physical mounting and supply chain logistics.

Replacement Considerations

Compatible substitutes include other single-channel transistor output optocouplers with similar isolation voltages and SMD footprints, such as the HCPL-2630 or generic equivalents from manufacturers like Vishay or Everlight, provided they match the 4-SMD package and electrical ratings.

FAQ

What is the typical switching speed of the FOD817D3S?

The typical rise and fall times are both 18 microseconds, suitable for general-purpose digital isolation rather than high-speed data communication.

Does the FOD817D3S support automotive applications?

No, the FOD817D3S is not certified for automotive standards; it is intended for general industrial and commercial use.