FOD852S

Overview

The FOD852S is a single-channel transistor output optocoupler manufactured by onsemi, designed for surface-mount applications. It features a photodarlington output configuration providing high current transfer efficiency. The device offers an insulation voltage of 5000 Vrms and supports a maximum collector-emitter voltage of 300 V. Key electrical parameters include a minimum current transfer ratio of 1000% at 1 mA input current, with a maximum ratio reaching 15000%. The forward voltage is specified at 1.4 V, while the maximum collector current is 150 mA. Saturation voltage is limited to 1.2 V, with rise and fall times of 300 us and 100 us respectively.

Feature Summary

• High gain photodarlington output structure for efficient signal isolation
• Robust 5000 Vrms insulation capability for safe electrical separation
• Surface-mount package design suitable for automated assembly processes

Applications

• Opto lighting systems requiring high isolation
• Industrial motor drive control circuits
• Machine vision interface modules

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets required safety standards such as DIN EN/IEC 60747-5-5 for safe electrical insulation if used in safety-critical designs. Cross-reference the RoHS compliance status with the latest product release notes to ensure regulatory adherence for your target market.

Selection Notes

Select this component when high current transfer ratio is necessary to drive downstream loads directly without additional amplification stages. The photodarlington output provides superior sensitivity compared to standard transistor outputs. Ensure the application voltage does not exceed the 300 V collector-emitter rating. Consider the 300 us rise time limitations for high-speed digital communication applications where faster switching is required.

Part Context

This part belongs to onsemi's family of transistor output optocouplers, specifically engineered for robust isolation in power electronics and industrial automation. The SMD-4 package variant facilitates compact PCB layouts. It complements other components in intelligent power and sensing solutions, particularly within motor drive and energy infrastructure systems where reliable galvanic isolation is essential for system integrity.

Replacement Considerations

Consult the official cross-reference guide for direct pin-compatible alternatives. Verify that any substitute maintains the 5000 Vrms isolation rating and similar current transfer characteristics. Ensure the replacement part supports the same surface-mount footprint and thermal requirements.