FOD2743CS

Overview

The FOD2743CS is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor, now part of onsemi. It features a high isolation voltage of 5000 Vrms and operates within a temperature range of -40°C to 85°C. The device provides a minimum current transfer ratio of 50% at 1mA input current, with a maximum collector-emitter saturation voltage of 400mV. It supports a maximum forward current of 20mA and has a typical forward voltage of 1.07V. The component is housed in an 8-SMD gull-wing package.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits
• Designed for error amplifier coupling applications
• Features a compact surface-mount package configuration

Applications

• Error amplifier coupling in power supplies
• Feedback control systems requiring galvanic isolation
• Industrial automation signal transmission

Procurement Notes

Verify the manufacturer status as Fairchild Semiconductor was acquired by onsemi. Confirm the component lifecycle status, as listings indicate it may be obsolete or discontinued. Ensure the specific package variant matches the design requirements before procurement.

Selection Notes

Select this component for applications requiring robust isolation and precise error amplification feedback. Consider the surface-mount form factor for automated assembly processes. Evaluate the thermal operating range to ensure compatibility with the intended environmental conditions.

Part Context

This device belongs to the FOD2743 series of optically isolated amplifiers. It is designed to replace older discrete isolation solutions by integrating LED and phototransistor components into a single package. The series is widely used in industrial and consumer electronics for reliable signal transfer across isolation barriers.

Replacement Considerations

The FOD2743BS is listed as a similar alternative part number from onsemi.