HM78D-755331MLFTR

Overview

The HM78D-755331MLFTR is a shielded surface mount coupled inductor from the HM78D series by TT Electronics/BI Magnetics. It features a two-coil array with a nominal inductance of 330 µH per coil. The component utilizes a rectangular package suitable for automated assembly. Electrical characteristics include a DC resistance of 1.41 Ω in parallel configuration and 5.66 Ω in series configuration. Current saturation in series mode is rated at 270 mA. The device operates within a temperature range of -40°C to +125°C and complies with RoHS standards.

Feature Summary

• Shielded magnetic design minimizes electromagnetic interference
• Dual-coil coupled inductor architecture supports SEPIC applications
• Surface mount construction facilitates automated PCB assembly

Applications

• SEPIC converter circuits
• DC-DC power conversion systems
• Portable electronic devices such as GPS units
• Digital camera power management

Procurement Notes

Verify the specific manufacturer part number against official TT Electronics documentation to confirm electrical parameters and mechanical dimensions. Ensure compatibility with surface mount reflow soldering profiles. Confirm RoHS compliance status through current datasheets. Validate supply chain authenticity via authorized distributors.

Selection Notes

Select this component for designs requiring coupled inductors with high efficiency and rugged performance. Consider the 270 mA series saturation current limit when sizing the power stage. Evaluate the 1.41 Ω parallel DC resistance for conduction loss calculations. Ensure the operating temperature range meets the environmental requirements of the target application.

Part Context

This component belongs to the HM78D series of shielded surface mount inductors manufactured by BI Technologies, a brand of TT Electronics. The series is engineered for general-purpose power applications, emphasizing low cost and high current handling capabilities. These components are widely utilized in consumer electronics and industrial control systems requiring reliable magnetics solutions.

Replacement Considerations

Consult official TT Electronics documentation for confirmed substitute part numbers within the HM78D family. Verify that any alternative component matches the 330 µH inductance, 270 mA saturation current, and physical footprint specifications.