FOD817C3S

Overview

The FOD817C3S is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and operates in a surface-mount SMD-4 package. The device provides 5000 Vrms insulation voltage for signal isolation. Key electrical parameters include a collector-emitter saturation voltage of 200 mV maximum, a forward current of 50 mA, and a forward voltage of 1.4 V. The current transfer ratio ranges from 200% to 400%. Rise and fall times are both 18 µs. Operating temperature spans from -55°C to +110°C with a power dissipation of 200 mW.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and phototransistor technology.
• Features high insulation voltage capability to protect low-voltage control circuits from high-voltage loads.
• Designed for surface-mount installation to facilitate automated PCB assembly processes.

Applications

• Signal isolation in industrial automation control systems
• Interface circuits for microcontrollers and logic devices
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix '3S' corresponds to the required surface-mount packaging configuration during procurement. Confirm that the current transfer ratio specifications meet the design requirements for the intended application. Ensure compliance with RoHS directives if applicable to the manufacturing region. Check datasheet revisions for any updates to mechanical dimensions or electrical limits before finalizing component selection.

Selection Notes

Select this component when surface-mount technology is required for compact circuit designs. Consider the 5000 Vrms isolation rating for applications involving significant potential differences between circuits. Evaluate the 18 µs switching speed against system timing requirements. Verify thermal management capabilities given the 200 mW power dissipation limit at elevated operating temperatures up to 110°C.

Part Context

This part belongs to the FOD817 series of transistor output optocouplers from onsemi. The series offers various packaging options including through-hole and surface-mount variants. The FOD817C3S specifically denotes the surface-mount version with defined current transfer ratio characteristics. This family is widely used for general-purpose isolation tasks in electronic equipment.

Replacement Considerations

Compatible substitutes include other FOD817 series surface-mount variants such as FOD817C3SD. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure replacement parts meet the same isolation voltage and temperature range specifications.