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FODM121AR1V
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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)：100% @ 5mA
- Current Transfer Ratio (Max)：300% @ 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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Overview
The FODM121AR1V is a single-channel optoisolator manufactured by onsemi, featuring a phototransistor output. It provides an isolation voltage of 3750Vrms and operates within a temperature range of -40°C to 110°C. The device utilizes a GaAs infrared LED input with a typical forward voltage of 1.3V and a maximum DC forward current of 50mA. The output transistor supports a collector-emitter voltage of 80V and a maximum collector current of 80mA, with a saturation voltage of 400mV. Current transfer ratio ranges from 100% to 300% at 5mA input. Rise and fall times are typically 3µs each. It is housed in a compact 4-SMD (鸥翼) surface-mount package.
Feature Summary
- High isolation voltage capability of 3750Vrms for robust signal transmission across isolated domains
- Compact 4-pin surface-mount design suitable for space-constrained PCB layouts
- Wide operating temperature range extending from -40°C to 110°C for industrial reliability
Applications
- General-purpose digital signal isolation in industrial control systems
- Power supply feedback loops requiring galvanic isolation
- Microcontroller interface circuits for noise immunity
Procurement Notes
Verify the specific suffix 'R1V' corresponds to the tape-and-reel packaging configuration when sourcing. Confirm that the component meets RoHS material declaration requirements as specified by onsemi. Ensure compatibility with standard surface-mount assembly processes for 4-SMD packages. Cross-reference datasheet revisions to confirm parameter consistency.
Selection Notes
Select this component when a single-channel transistor-output isolator is required with high voltage isolation ratings. Consider the 3µs switching speed for moderate-frequency applications. Evaluate the 4-SMD footprint against available board space. Compare current transfer ratio specifications against load requirements to ensure adequate drive capability.
Part Context
The FODM121AR1V belongs to the FODM121 family of optoisolators produced by onsemi. This series includes variants such as FODM121A and FODM121DR1V, sharing similar electrical characteristics but differing in packaging or reel configurations. The family is designed for general-purpose isolation tasks using GaAs infrared technology.
Replacement Considerations
Direct substitutes include other FODM121 variants like FODM121A if packaging differences are acceptable. Verify pinout compatibility and isolation voltage ratings before substituting with generic transistor-output optocouplers.
