FOD814W

Overview

The onsemi FOD814W is a single-channel, transistor-output optocoupler housed in a 4-pin DIP package. It features an NPN phototransistor output with a maximum collector-emitter voltage of 70V and a continuous collector current of 50mA. The device provides 5000 Vrms isolation voltage between input and output. Electrical characteristics include a typical forward voltage of 1.2V to 1.4V at a maximum forward current of 50mA. The current transfer ratio ranges from 50% to 150%, with typical rise and fall times of 4µs and 3µs respectively. It operates within a temperature range of -55°C to +105°C.

Feature Summary

• Provides high-voltage electrical isolation via 5000 Vrms dielectric barrier
• Features fast switching performance with typical 4µs rise and 3µs fall times
• Supports AC or DC input signal types for versatile interface compatibility
• Delivers robust output drive capability with 50mA continuous collector current

Applications

• General-purpose digital signal isolation in industrial control systems
• Power supply feedback loops requiring galvanic separation
• Microcontroller interface circuits for noise immunity
• Solid-state relay driver applications

Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm pinout configuration and packaging type. Ensure the selected variant meets the required insulation voltage ratings for your safety standards. Cross-reference the ordering part number with the latest onsemi documentation to avoid discrepancies in lead times or RoHS compliance status before finalizing procurement.

Selection Notes

Select this component when high-speed switching is required alongside significant isolation voltage. The FOD814W offers faster response times compared to standard general-purpose optocouplers. Consider the 4-DIP package for through-hole mounting requirements. Evaluate the current transfer ratio specifications to ensure adequate signal transmission margins for the specific load conditions in the target circuit design.

Part Context

The FOD814W belongs to the FOD814 series of transistor-output optocouplers manufactured by onsemi. This series is designed for applications demanding reliable signal transmission across isolated barriers. The W suffix typically denotes the 4-pin DIP package configuration. It serves as a common solution for isolating low-voltage control logic from higher-voltage power stages in electronic systems.

Replacement Considerations

FOD814SD and FOD814A300 are alternative variants within the same family offering similar electrical characteristics but in SMD and PDIP packages respectively. Verify pin compatibility and thermal performance when substituting surface-mount or different through-hole versions.