FOD814A300

Overview

The onsemi FOD814A300 is a single-channel transistor output optocoupler housed in a 4-pin PDIP package. It features an NPN phototransistor output with a maximum collector-emitter voltage of 70V and a peak collector current of 50mA. The device supports AC or DC input signals, with a typical forward voltage of 1.4V and a maximum forward current of 50mA. Key electrical parameters include a current transfer ratio ranging from 20% to 300%, a typical rise time of 18µs, and a fall time of 18µs. It provides 5000Vrms isolation voltage and operates within a temperature range of -55°C to 100°C.

Feature Summary

• Provides high-voltage isolation between input and output circuits for signal transmission.
• Supports both AC and DC input signal types for versatile interface applications.
• Features a standard NPN phototransistor output configuration for direct logic interfacing.

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits for microprocessors and logic families
• Power supply feedback loops requiring galvanic isolation

Procurement Notes

Verify the specific suffix '300' corresponds to the PDIP-4 through-hole package variant when sourcing. Confirm that the component meets RoHS compliance requirements if mandated by project specifications. Ensure the supplier provides valid datasheets confirming the 5000Vrms isolation rating and electrical characteristics match the required design parameters before finalizing procurement.

Selection Notes

Select this component when a robust, general-purpose optocoupler with high isolation voltage is required for through-hole assembly. The wide operating temperature range makes it suitable for harsh environments. Consider the 18µs switching speed limitations compared to faster variants if high-frequency data transmission is critical for the application design.

Part Context

The FOD814A300 belongs to the FOD814 series of 4-pin DIP phototransistor optocouplers manufactured by onsemi. This series is designed for general-purpose isolation applications, offering a balance of performance and reliability. The part serves as a replacement for legacy components like the H11AA814W, maintaining similar functional characteristics while adhering to modern manufacturing standards.

Replacement Considerations

The FOD814A300 is documented as a direct substitute for the discontinued H11AA814W. Verify pinout compatibility and electrical parameter alignment when transitioning from legacy parts to ensure seamless integration without circuit redesign.