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FODM121
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Product Detailed Parameters
- Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
- Series：-
- Mfr：onsemi
- Package：Tube
- 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
- Grade：-
- Qualification：-
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Overview
The onsemi FODM121 is a single-channel transistor output optocoupler housed in a 4-pin Mini-Flat Package (MFP). It features a phototransistor output and accepts DC input. Key electrical parameters include a maximum collector current of 50 mA, an isolation voltage of 3750 Vrms, and a typical rise/fall time of 3 µs. The device supports a maximum forward voltage of 1.3V and offers a maximum current transfer ratio of 300%.
Feature Summary
- Provides galvanic isolation between input and output circuits using a phototransistor configuration.
- Designed for surface mount installation within a compact four-terminal Mini-Flat Package.
- Capable of handling high isolation voltages to ensure signal integrity across separated domains.
Applications
- General purpose signal isolation in industrial control systems
- Interface circuits for microprocessor-based logic systems
- Power supply feedback loops requiring component-level isolation
Procurement Notes
Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure the selected variant matches the required current transfer ratio and isolation voltage ratings for the target application environment. Cross-reference the component marking with official documentation to prevent counterfeit substitution.
Selection Notes
Select this component when a single channel of isolation is sufficient for the circuit design. Consider the 3 µs switching speed for applications requiring moderate data rates. Evaluate the thermal performance at the maximum operating temperature of 110°C to ensure reliability under continuous load conditions without exceeding junction limits.
Part Context
This device belongs to the FODM series of transistor output optocouplers manufactured by onsemi. The series provides various channel counts and package options for isolation needs. The FODM121 specifically utilizes the Mini-Flat Package format, distinguishing it from standard DIP or SOP variants within the broader product family.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's cross-reference guide for verified alternatives.
