HMHA281

Transistor, Photovoltaic Output Optoisolators Overview

The onsemi HMHA281 is a single-channel transistor output optocoupler featuring a Mini-Flat (MFP) surface-mount package. It provides an isolation voltage of 3750Vrms and supports a maximum forward current of 50mA with a typical forward voltage of 1.3V. The device exhibits a collector-emitter saturation voltage of 400mV max, reverse voltage of 6V, and power dissipation of 210mW. Current transfer ratio ranges from 50% to 600%, with typical rise and fall times of 3μs. Operating temperature spans -55°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage capability of 3750Vrms for robust signal separation
• Compact four-pin Mini-Flat surface-mount packaging for space-constrained designs
• Fast switching performance with 3μs typical rise and fall times
• Wide operating temperature range suitable for demanding industrial environments

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation control systems
• Signal isolation in measurement equipment
• Power supply feedback loops
• General-purpose digital isolation interfaces

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., R2, V) against the datasheet to confirm packaging format such as reel or tube. Ensure compliance requirements like RoHS are met for the target region. Confirm that the supplier provides official documentation matching the exact part number variant to avoid discrepancies in electrical characteristics or pinout configuration.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and compact size are critical. The NPN phototransistor output suits logic-level interfacing. Consider the 50% minimum CTR for reliable switching at low input currents. Verify thermal management needs given the 210mW power dissipation limit in enclosed spaces.

Transistor, Photovoltaic Output Optoisolators Part Context

Part of the HMHA series, designed for general-purpose isolation. Competes with standard SOIC-4 optocouplers but offers a smaller footprint. Commonly used where board space is limited but high isolation integrity is required. Replaced by newer variants in some product lines.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

HMHA281R2 and HMHA281V are direct variants within the same family. Check datasheets for differences in packaging type, specifically reel versus bulk tube formats. Electrical parameters remain consistent across these suffixes.