HM78D-7551R5MLFTR

Overview

The HM78D-7551R5MLFTR is a coupled inductor from the HM78D series manufactured by TT Electronics/BI Magnetics. It features a shielded surface mount design with four terminals arranged in a dual inline configuration within a rectangular package measuring 7.70mm x 7.70mm. The component operates within a temperature range of -40°C to +125°C and has an inductance tolerance of 20%. When connected in parallel, the inductance is 1.5µH; when connected in series, it is 5.688µH.

Feature Summary

• Dual coil architecture supporting series, parallel, or transformer configurations
• Magnetically shielded surface mount construction for reduced interference
• High efficiency and rugged design suitable for demanding environments

Applications

• SEPIC converter circuits
• DC-DC converters
• GPS systems
• Digital cameras

Procurement Notes

Verify the specific part number HM78D-7551R5MLFTR against official manufacturer documentation to confirm current availability status. Some sources indicate this specific variant may be discontinued at major distributors. Ensure the selected component matches the required electrical characteristics and physical dimensions for your PCB layout before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring coupled inductors with specific parallel or series inductance values. The 1.5µH parallel and 5.688µH series ratings define its electrical performance. Consider the 7.70mm x 7.70mm footprint and 125°C maximum operating temperature when designing for space-constrained or high-thermal environments.

Part Context

This component belongs to the HM78D series of magnetics shielded surface mount inductors. The series is characterized by high inductance, high efficiency, and excellent current handling capabilities. These parts are designed as low-cost, rugged solutions for various power management and signal processing applications.

Replacement Considerations

Check for direct substitutes within the HM78D family that offer compatible inductance and current ratings. Verify pinout compatibility and physical dimensions if replacing with components from other manufacturers offering similar coupled inductor architectures.