HM78D-128471KLFTR

Overview

The HM78D-128471KLFTR is a surface-mount coupled inductor array manufactured by TT Electronics/BI Magnetics. It features two coils with a parallel inductance of 470 µH and a series inductance of 2.72 mH, both at a ±10% tolerance. The component has a maximum DC resistance of 765 mOhms and supports a maximum DC current of 1.6 A. Its physical dimensions are 12.50 mm x 12.50 mm x 8.05 mm.

Feature Summary

• Dual-coil surface mount coupled inductor design
• High inductance values for power filtering applications
• Tight ±10% inductance tolerance for precision circuits

Applications

• DC-DC converter input/output filtering
• Power supply noise suppression
• Signal integrity enhancement in mixed-signal boards

Procurement Notes

Verify the exact suffix 'K' indicates the specific 10% tolerance variant. Confirm availability as distribution status may vary. Ensure the footprint matches the 12.50mm x 12.50mm nonstandard package. Check for RoHS compliance documentation if required for your assembly process.

Selection Notes

Select this part when high inductance density is required in a compact SMD form factor. The 10% tolerance suits applications needing tighter parameter control than standard 20% parts. Compare DCR and saturation current against circuit requirements to ensure adequate performance margins.

Part Context

This component belongs to the HM78D series of surface mount coupled inductors from TT Electronics/BI Magnetics. The series offers various inductance values and package sizes. The HM78D-128471KLFTR specifically provides higher inductance compared to lower-value variants in the same footprint family.

Replacement Considerations

Direct substitutes include other 470µH coupled inductors with similar 12.5x12.5mm footprints. Verify pinout compatibility and electrical parameters such as DCR and current rating before substitution.