FOD814300

Overview

The FOD814300 is a single-channel transistor output optocoupler from onsemi, designed for lighting applications. It features an NPN phototransistor output with a maximum collector-emitter voltage of 70V and a peak forward current of 50mA. The device offers a high isolation voltage of 5000Vrms and operates within a temperature range of -55°C to 110°C. Key electrical parameters include a minimum current transfer ratio of 20% and a maximum of 300%, with typical rise and fall times of 18μs.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits
• Utilizes a gallium arsenide infrared emitting diode for efficient light transmission
• Features an NPN phototransistor output suitable for digital signal switching
• Complies with international safety standards including UL, VDE, and IEC

Applications

• Lighting control systems
• Industrial process control
• Power supply feedback loops
• Signal isolation in microprocessor systems

Procurement Notes

Verify the specific suffix '300' corresponds to the required packaging configuration, as this often denotes tape-and-reel quantities distinct from bulk or tube options. Confirm that the PDIP-4 package variant matches the intended PCB footprint and thermal requirements. Ensure compliance with RoHS directives if environmental regulations apply to the final assembly. Cross-reference the datasheet revision date to confirm parameter stability against older versions.

Selection Notes

Select the FOD814300 when high-speed switching is not critical but robust isolation and wide operating temperature ranges are required. Compare the 18μs propagation delay against faster alternatives like the FOD814SD if circuit timing constraints are tight. Evaluate the CTR range of 20% to 300% to ensure sufficient gain for the load current requirements without excessive drive current.

Part Context

This component belongs to the FOD814 series, which includes various packages such as SMT (FOD814SD) and through-hole variants. The series is characterized by its use of proprietary process technology for reliable performance in industrial and consumer electronics. It serves as a general-purpose optoisolator alternative to standard 4Nxx series devices, offering higher speed and better CTR consistency.

Replacement Considerations

Direct pin-compatible substitutes may include other FOD814 series parts with different suffixes for packaging changes. Generic replacements like the PC817 offer similar functionality but typically feature lower isolation voltages and slower response times. Verify that any substitute maintains the 5000Vrms isolation rating and 70V collector-emitter voltage specification.