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FODM121CR2
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Product Detailed Parameters
- Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Channels：1
- Voltage - Isolation：3750Vrms
- Current Transfer Ratio (Min)：100% @ 5mA
- Current Transfer Ratio (Max)：200% @ 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 FODM121CR2 is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output housed in a Mini-Flat (MFP) SMD-4 package. Key electrical parameters include a maximum collector-emitter voltage of 80 V and a maximum collector current of 80 mA. The device supports a forward current of 50 mA with a forward voltage of 1.3 V. It provides an isolation voltage of 3750 Vrms. The current transfer ratio ranges from 100% to 200%, with typical rise and fall times of 3 µs.
Feature Summary
- Provides high-voltage isolation between input and output circuits using a phototransistor architecture.
- Utilizes a compact Mini-Flat surface-mount package for efficient PCB space utilization.
- Offers reliable signal transmission with defined current transfer ratio characteristics.
Applications
- General-purpose signal isolation in industrial control systems
- Interface circuits for microcontrollers and logic devices
- Power supply feedback loops requiring galvanic separation
Procurement Notes
Verify the specific suffix CR2 against the official onsemi datasheet to confirm tape-and-reel packaging and environmental compliance status. Ensure the ordering part number matches the required quantity format. Cross-reference the manufacturer's latest revision notes to confirm pinout compatibility and thermal specifications before finalizing procurement orders.
Selection Notes
Select this component when a small form-factor optocoupler is required for DC input applications. The 80 V collector-emitter voltage rating suits low-to-medium voltage switching tasks. Consider the 3 µs switching speed for moderate-frequency signals. Verify that the 3750 Vrms isolation rating meets the safety requirements of the target application circuit design.
Part Context
This device belongs to onsemi's family of transistor output optocouplers designed for general-purpose isolation. The Mini-Flat package variant offers a footprint smaller than traditional DIP packages, facilitating automated assembly. It serves as a standard solution for basic digital signal isolation where high-speed performance is not the primary constraint.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official cross-reference guides or contact onsemi sales engineering for verified equivalent components meeting identical electrical and mechanical specifications.
