FODM352

Overview

The FODM352 is a single-channel photodarlington optocoupler manufactured by onsemi. It features a 3750Vrms isolation voltage and supports a maximum load voltage of 300V. The device utilizes a DC input type with a typical forward voltage of 1.2V and a maximum DC forward current of 50mA. Output characteristics include a collector-emitter saturation voltage of up to 1.2V and an output current capability of 150mA per channel. The minimum current transfer ratio is specified at 1000% when driven at 1mA. Typical switching times are 20µs for rise time and 100µs for fall time. It operates within a temperature range of -55°C to 110°C and is housed in a 4-SMD,鸥翼 (Gull Wing) package.

Feature Summary

• Integrates a photodarlington transistor output stage for high current gain applications
• Provides robust electrical isolation rated at 3750Vrms between input and output circuits
• Designed for surface mount installation using a compact 4-pin Mini-Flat package

Applications

• Industrial control systems requiring galvanic isolation
• Solid-state relay driver circuits
• Power supply feedback loops

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm packaging configuration, as standard tubes and tape-and-reel variants exist. Ensure the selected variant matches the required quantity constraints and reel specifications for automated assembly processes. Confirm RoHS compliance status if environmental regulations apply to the final product design.

Selection Notes

Select this component when high current drive capability is needed from a low-power logic signal. The photodarlington output offers superior current transfer compared to standard phototransistors. Consider the slower switching speeds relative to logic outputs when designing for high-frequency digital communication interfaces. Verify thermal management requirements given the operating temperature range and power dissipation limits.

Part Context

This device belongs to the FODM352 series of transistor output optoisolators. It serves as a solid-state alternative to electromechanical relays in isolation applications. The family focuses on providing reliable signal transmission across isolated boundaries while maintaining compact form factors suitable for modern PCB layouts.

Replacement Considerations

The FODM352R2 is a verified substitute part number representing the same functional device in a tape-and-reel packaging format.