HMA121FR3

Transistor, Photovoltaic Output Optoisolators Overview

The HMA121FR3 is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor. It features an NPN phototransistor output housed in a 4-pin SMD Mini-Flat Package (MFP). The device provides an insulation voltage of 3750 Vrms and supports a maximum collector-emitter voltage of 80 V. Key electrical parameters include a forward current of 50 mA, typical forward voltage of 1.3 V, and a current transfer ratio ranging from 100% to 200%. The unit operates within a temperature range of -40°C to +100°C with a power dissipation of 150 mW.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides high-voltage isolation between input and output circuits via optical coupling
• Utilizes a compact surface-mount Mini-Flat Package for efficient board space utilization
• Features NPN phototransistor output suitable for digital signal transmission

Transistor, Photovoltaic Output Optoisolators Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits for microcontrollers requiring galvanic isolation
• Power supply feedback loops for safety compliance

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm package orientation and pinout compatibility during integration. Check for RoHS compliance status if required by specific regulatory frameworks. Ensure storage conditions maintain component integrity prior to assembly.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and compact form factor are required. Consider the NPN output configuration for standard logic interfacing. Evaluate thermal management requirements given the 150 mW power dissipation limit. Compare against alternative optocouplers if higher current transfer ratios or different packaging styles are needed.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the HMA121 series of optocouplers designed for general-purpose isolation applications. The series emphasizes reliability and compactness for modern electronic designs. Fairchild Semiconductor, now part of onsemi, produced this line to meet industry standards for signal isolation.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes may include other 4-pin transistor output optocouplers with similar isolation ratings and package dimensions. Verify pinout compatibility and electrical specifications before substitution. Consult manufacturer cross-reference lists for confirmed equivalent parts.