FOD816

Overview

The FOD816 is a single-channel optocoupler featuring two gallium arsenide infrared emitting diodes connected in inverse parallel, driving a silicon photodarlington output. It provides electrical isolation with a maximum insulation voltage of 5000 VAC RMS. The device operates with a minimum collector-emitter breakdown voltage of 70 V and supports a maximum forward current of 50 mA. Typical current transfer ratio is rated at 80%, while maximum dark power remains at 100 nA.

Feature Summary

• Dual inverse-parallel infrared LED input configuration for AC signal compatibility
• Silicon photodarlington output stage for high gain
• High voltage insulation capability up to 5000 VAC RMS

Applications

• Isolating intelligent power modules
• Industrial communication interfaces
• General-purpose digital signal isolation

Procurement Notes

Verify the specific ordering suffix against ON Semiconductor documentation, as Fairchild part numbers containing underscores may require conversion to dashes during integration. Confirm package type and lead-free status match project requirements before procurement.

Selection Notes

Select this component when AC input detection or bidirectional optical triggering is required within a single channel. The dual-diode input structure simplifies circuit design for alternating current applications compared to single-diode alternatives.

Part Context

This component belongs to the FOD816 series of 4-pin phototransistor optocouplers manufactured by Fairchild Semiconductor, now part of ON Semiconductor. The series utilizes standard DIP-4 packaging for through-hole mounting applications requiring reliable galvanic isolation between control and load circuits.

Replacement Considerations

Check ON Semiconductor website for updated part numbers due to underscore-to-dash naming convention changes during the Fairchild integration process.