HMA121V

Transistor, Photovoltaic Output Optoisolators Overview

The HMA121V is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor. It features a compact 4-pin Mini-Flat surface mount package designed for space-constrained applications. The device provides high isolation capability with a voltage rating of 3750Vrms, ensuring reliable signal transmission across isolated boundaries. Key electrical specifications include a minimum collector-emitter breakdown voltage of 80V and a maximum forward current of 50mA. The component operates within a temperature range of -40°C to 100°C and exhibits a typical current transfer ratio of 150% at 5mA input current.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage rating of 3750Vrms for robust circuit protection
• Compact 4-pin full pitch Mini-Flat surface mount package design
• Wide operating temperature range supporting industrial environments
• UL recognized and VDE approved safety certifications

Transistor, Photovoltaic Output Optoisolators Applications

• Digital logic inputs
• Microprocessor inputs
• Power supply monitor circuits
• Twisted pair line receivers
• Telephone line receivers

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'V' against the manufacturer's official documentation to confirm package type and compliance status. Check product lifecycle status as some listings indicate obsolete status. Ensure the selected variant matches the required creepage and clearance distances for your specific insulation coordination requirements. Confirm lead-free and RoHS compliance details directly from the datasheet before integration.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a small footprint and high isolation voltage are critical for the design. The transistor output configuration is suitable for general-purpose switching applications requiring galvanic isolation. Consider the current transfer ratio variations and saturation voltage limits when designing the drive circuitry. Ensure the PCB layout accommodates the 4-pin Mini-Flat package dimensions and maintains adequate spacing for the specified isolation voltage.

Transistor, Photovoltaic Output Optoisolators Part Context

The HMA121V belongs to the FODM121 series of transistor output optocouplers. This series includes variants such as the FODM121EV and FODM124, all sharing similar functional characteristics but potentially differing in packaging or certification details. These devices are part of Fairchild's portfolio of digital isolators designed for industrial and communication applications requiring reliable signal transfer between isolated domains.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult the manufacturer's official replacement guide or contact technical support for verified alternatives. Cross-referencing with other transistor output optocouplers requires careful verification of pinout compatibility, isolation ratings, and electrical parameters.