HM78D-12108R2MLFTR

Overview

The HM78D-12108R2MLFTR is a shielded surface mount coupled inductor array manufactured by TT Electronics/BI Magnetics. It features two coils with an inductance of 8.2 µH when connected in parallel and 32.8 µH in series, maintaining a tolerance of ±20%. The component supports a maximum DC current of 12.85 A and exhibits a maximum DC resistance of 18 mΩ in the parallel configuration. Its physical dimensions are 12.5 mm in length, 12.5 mm in width, and 10.5 mm in height. The device operates within a temperature range of -40°C to +85°C and utilizes SMD/SMT termination types for PCB integration.

Feature Summary

• Dual-coil architecture providing configurable series or parallel magnetic coupling
• Shielded construction to minimize electromagnetic interference
• Surface mount design optimized for automated PCB assembly

Applications

• Multi-phase synchronous buck converter input filtering
• DC-DC power supply interleaved topologies
• High-current point-of-load regulation stages

Procurement Notes

Verify the complete part number including suffixes against official manufacturer documentation to ensure correct inductance and tolerance specifications. Confirm RoHS compliance status through the latest datasheet as regulatory requirements may evolve. Cross-reference package dimensions and pinout configurations with your PCB footprint library prior to procurement to prevent mechanical mismatches during assembly.

Selection Notes

Select this component when designing circuits requiring coupled inductors with high current handling capabilities in a compact form factor. Ensure the operating current remains below the 12.85 A maximum rating to maintain performance. Verify that the available board space accommodates the 12.5 mm x 12.5 mm footprint and 10.5 mm height constraints while allowing for adequate thermal dissipation.

Part Context

This component belongs to the HM78D series of shielded surface mount coupled inductors from TT Electronics/BI Magnetics. The series offers various inductance values tailored for power management applications. The HM78D-12108R2MLFTR specifically addresses needs for dual-channel power delivery systems where magnetic coupling improves efficiency and reduces overall component count compared to discrete inductors.

Replacement Considerations

No publicly confirmed substitute part numbers are available in the provided source material.