FODM121R2V

Overview

The FODM121R2V is a single-channel transistor output optocoupler from onsemi, housed in a 4-SMD Mini-Flat package. It provides an isolation voltage of 3750 Vrms and supports a maximum collector-emitter voltage of 80 V with a peak output current of 80 mA. The device features a typical forward voltage of 1.3 V and a maximum DC forward current of 50 mA. Its current transfer ratio ranges from 50% to 600%, with typical rise and fall times of 3 µs each. Operating within a temperature range of -40°C to +110°C, it ensures reliable signal transmission across isolated circuits.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using optical coupling technology.
• Features a compact surface-mount Mini-Flat package designed for automated assembly and space-constrained applications.
• Delivers fast switching performance with symmetric rise and fall times suitable for digital signal transmission.

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families requiring galvanic separation
• Power supply feedback loops and monitoring circuits

Procurement Notes

Verify the specific suffix R2V corresponds to the reel packaging configuration required for your production line. Confirm that the 4-SMD Mini-Flat footprint matches your PCB layout constraints. Ensure compliance with RoHS3 standards if applicable to your region. Cross-reference the manufacturer part number against official distributor catalogs to avoid counterfeit components. Validate thermal management requirements for operation near the upper temperature limit.

Selection Notes

Select this component when a single channel of high-isolation voltage is needed with a phototransistor output. Compare the 50-600% CTR range against load requirements to ensure sufficient drive capability. Consider the 3 µs switching speed for compatibility with target data rates. Evaluate the 4-SMD package size relative to available board space compared to through-hole alternatives.

Part Context

This device belongs to the FODM121 series of transistor output optocouplers manufactured by onsemi. The series is characterized by its use of gallium arsenide infrared LEDs coupled to silicon phototransistors. The Mini-Flat package variant offers a low-profile solution compared to traditional DIP packages, facilitating modern surface-mount manufacturing processes while maintaining robust isolation characteristics.

Replacement Considerations

The FODM121A is documented as a parameter-equivalent substitute. Verify pinout compatibility and package dimensions before substitution. Ensure the alternative meets the same 3750 Vrms isolation rating and electrical specifications.