FODM121ER2

Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Tape & Reel (TR)

SKU:b3d4f87f07b2 Category: Transistor, Photovoltaic Output Optoisolators Brand: onsemi

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Product introduction

Product Detailed Parameters

Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Tape & Reel (TR)
Number of Channels：1
Voltage - Isolation：3750Vrms
Current Transfer Ratio (Min)：50% @ 5mA
Current Transfer Ratio (Max)：600% @ 5mA
Turn On / Turn Off Time (Typ)：-
Rise / Fall Time (Typ)：3µs, 3µs
Input Type：DC
Output Type：Transistor
Voltage - Output (Max)：80V
Current - Output / Channel：80mA
Voltage - Forward (Vf) (Typ)：1.3V (Max)
Current - DC Forward (If) (Max)：50 mA
Vce Saturation (Max)：400mV
Operating Temperature：-40°C ~ 110°C
Mounting Type：Surface Mount
Package / Case：4-SMD, Gull Wing
Supplier Device Package：4-SMD

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FODM121ER2

Overview

The FODM121ER2 is a single-channel transistor output optocoupler manufactured by onsemi. It integrates an aluminum gallium arsenide infrared emitting diode optically coupled to an NPN silicon phototransistor in a compact 4-SMD surface-mount package. The device provides high isolation voltage of 3750Vrms and supports a maximum forward current of 50mA with a collector-emitter saturation voltage of 400mV. It features typical rise and fall times of 3µs, ensuring reliable signal transmission across isolated circuits.

Feature Summary

Integrates an aluminum gallium arsenide infrared LED with an NPN silicon phototransistor for optical coupling
Provides robust electrical isolation between input and output circuits
Designed for compact surface-mount applications requiring minimal board space

Applications

General-purpose digital signal isolation
Microcontroller interface circuits
Industrial control systems

Procurement Notes

Verify the specific suffix 'ER2' against the manufacturer's latest datasheet to confirm tape-and-reel packaging and exact electrical tolerances. Ensure compatibility with RoHS3 standards and check for any recent product change notices regarding assembly or material declarations before finalizing procurement specifications.

Selection Notes

Select this component when a small footprint is required for single-channel isolation. Compare the 3750Vrms isolation rating and 3µs switching speed against system requirements. Consider the 4-SMD package constraints and thermal management needs relative to alternative through-hole options if higher power dissipation is anticipated.

Part Context

This part belongs to the FODM121 family of transistor output optocouplers from onsemi. These devices are designed to replace larger through-hole optocouplers in modern electronics where space efficiency is critical. The family typically includes variants with different packaging or lead-free specifications, maintaining consistent core electrical performance characteristics.