FODM121C

Overview

The FODM121C is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and operates within a temperature range of -40°C to +110°C. Key electrical parameters include a maximum collector-emitter voltage of 80V, a maximum collector current of 80mA, and a forward current of 50mA. The device provides an isolation voltage of 3750 Vrms with a typical rise and fall time of 3µs. Current transfer ratio ranges from 100% to 200%, and power dissipation is rated at 150mW.

Feature Summary

• Provides high-voltage isolation between input and output circuits
• Utilizes a compact surface-mount package for space-constrained designs
• Features fast switching speeds suitable for general-purpose signal transmission

Applications

• General-purpose digital signal isolation
• Microcontroller interface circuits
• Industrial control system inputs

Procurement Notes

Verify the specific suffix (e.g., C, AR2) against the datasheet to ensure correct packaging and tolerance specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to ordering. Cross-reference manufacturer part numbers with distributor codes to avoid substitution errors during procurement.

Selection Notes

Select this component when a single-channel transistor output is required for low-speed isolation applications. Consider the 80V collector-emitter voltage limit and 80mA current capacity for load compatibility. Ensure the operating temperature range meets the environmental conditions of the target application.

Part Context

This component belongs to the FODM121 series of transistor output optocouplers. It is designed for general-purpose isolation tasks where cost-effectiveness and standard performance metrics are prioritized over high-speed or logic-output characteristics.

Replacement Considerations

Public confirmed substitute part numbers: FODM121AR2.