FODM121CV

Overview

The FODM121CV is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and operates within a surface-mount SMD-4 package. The device provides an isolation voltage of 3750 Vrms, supporting safe signal transmission between isolated circuits. Key electrical parameters include a maximum collector-emitter voltage of 80 V and a maximum collector current of 80 mA. The forward voltage is typically 1.3 V with a maximum forward current of 50 mA. The unit exhibits a typical rise and fall time of 3 µs, ensuring adequate speed for general-purpose applications.

Feature Summary

• Provides high-voltage electrical isolation via optical coupling between input and output circuits
• Utilizes an NPN phototransistor output stage for reliable switching performance
• Designed for surface-mount installation to facilitate compact PCB layouts

Applications

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

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest datasheet to confirm pinout compatibility and electrical tolerances. Ensure that the procurement source provides valid RoHS compliance documentation as required by project specifications. Cross-reference the ordering part number with official distributor catalogs to avoid discrepancies in packaging or variant characteristics before finalizing purchase orders.

Selection Notes

Select this component when a single-channel isolation barrier with moderate speed requirements is necessary. The NPN phototransistor output suits applications driving low-current loads directly. Consider the 3750 Vrms isolation rating for safety-critical designs. Evaluate the thermal dissipation capabilities relative to the ambient operating temperature range specified in the technical documentation to ensure long-term reliability under load conditions.

Part Context

This component belongs to the FODM121 series of optocouplers from onsemi. The series offers various package options and suffixes tailored for different mounting styles and regulatory requirements. As a standard product, it supports scalable Treo platform initiatives aimed at ensuring long-term availability and consistent quality for industrial and consumer electronic designs requiring basic signal isolation.

Replacement Considerations

Compatible substitutes within the same family include FODM121C and FODM121CR2V. Verify that alternative part numbers match the required isolation voltage and output configuration before integration.