FOD816S

Overview

The onsemi FOD816S is a single-channel optoisolator featuring a Darlington transistor output. It utilizes a surface-mount SMD package with four pins in a gull-wing configuration. The device provides an isolation voltage of 5000Vrms and supports both AC and DC input signals. Key electrical parameters include a maximum forward current of 50mA, a typical forward voltage of 1.2V, and a minimum current transfer ratio of 600% at 1mA input. The component operates within a temperature range of -30°C to 100°C.

Feature Summary

• High current transfer capability via Darlington output stage
• Robust electrical isolation for signal integrity
• Supports direct AC or DC input control

Applications

• Industrial automation control systems
• Power supply feedback loops
• Solid-state relay driver circuits

Procurement Notes

Verify the specific suffix code against official datasheets to confirm pinout and packaging variations. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolete status indicators before finalizing procurement plans. Ensure the supplier provides traceable documentation matching the manufacturer's part number exactly.

Selection Notes

Select this component when high gain is required for driving loads directly from low-current logic signals. The Darlington output structure offers superior sensitivity compared to standard phototransistors. Verify that the surface-mount form factor fits the available PCB real estate. Ensure the operating environment remains within the specified thermal limits for reliable long-term performance.

Part Context

This device belongs to the FOD816 series of optocouplers designed for general-purpose isolation applications. It serves as a bridge between low-voltage control circuits and higher-voltage power stages. The series is characterized by its ability to handle significant current gains while maintaining strict isolation barriers.

Replacement Considerations

Public confirmed substitute part numbers include LTV-8141S and LTV-8141S-TA from Lite-On. These alternatives offer similar Darlington output characteristics and pin configurations for direct replacement in existing designs.