HMHAA280

Transistor, Photovoltaic Output Optoisolators Overview

The HMHAA280 is a discontinued single-channel optocoupler from onsemi, featuring an AC/DC input and NPN phototransistor output. It provides 3750Vrms isolation voltage within a compact 4-Mini-Flat surface-mount package. Key electrical parameters include a maximum collector-emitter voltage of 80V, a typical forward voltage of 1.4V, and a maximum DC forward current of 50mA. The device exhibits a current transfer ratio ranging from 50% to 600% at 5mA input, with typical rise and fall times of 3µs each. It operates reliably across a temperature range of -55°C to 100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Supports both AC and DC input signal types for versatile interface applications
• Provides high-voltage galvanic isolation between input and output circuits
• Utilizes a compact half-pitch Mini-Flat package for space-constrained designs

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Communication interface isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component obsolescence status prior to design finalization, as the HMHAA280 is officially listed as obsolete by the manufacturer. Confirm availability through authorized distributors or secondary market suppliers, noting that stock levels may be limited. Ensure that any sourced units match the original datasheet specifications and packaging requirements to maintain system reliability and compliance with existing design constraints.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Consider the HMHA280 series variants when selecting components, as they share similar architectural features but may differ in input type or packaging. Evaluate alternative models such as the HMHAA280R2V for potential compatibility, ensuring that electrical characteristics like isolation voltage and current transfer ratio meet application requirements. Review official replacement guides to identify suitable cross-references that maintain performance standards without requiring circuit redesign.

Transistor, Photovoltaic Output Optoisolators Part Context

The HMHAA280 belongs to the HMHA series of optocouplers designed for general-purpose isolation applications. This series emphasizes compact form factors and robust electrical performance, catering to industries where space efficiency and reliable signal transmission are critical. The specific model integrates a gallium arsenide infrared emitter with an NPN phototransistor, offering a balance of speed and isolation capability within a standardized footprint used across various electronic equipment.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

The HMHAA280R2V is documented as a similar replacement part manufactured by onsemi.