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Product Detailed Parameters
- Description：INDUCT ARRAY 2 COIL 47UH SMD
- Series：HM78D
- Mfr：TT Electronics/BI Magnetics
- Package：Cut Tape (CT)
- Number of Coils：2
- Inductance - Connected In Parallel：47 µH
- Inductance - Connected In Series：188 µH
- Tolerance：±20%
- Current Rating - Parallel：3:00 AM
- Current Rating - Series：1.5 A
- DC Resistance (DCR) - Parallel：90mOhm
- DC Resistance (DCR) - Series：360mOhm
- Shielding：Shielded
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：Nonstandard
- Size / Dimension：0.492" L x 0.492" W (12.50mm x 12.50mm)
- Height：0.317" (8.05mm)
- Current Saturation - Parallel：5.2 A
- Current Saturation - Series：2.6 A
- Ratings：-
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Overview
The HM78D-128470MLFTR is a shielded surface-mount coupled inductor array manufactured by TT Electronics/BI Magnetics. It features two coils with a parallel inductance of 47 µH and a series inductance of 188 µH, both at a ±20% tolerance. The component has a maximum DC resistance of 90 mOhms and supports a maximum DC current of 5.2 A. Its physical dimensions are 12.5 mm x 12.5 mm x 6.2 mm, designed for PCB mounting.
Feature Summary
- Dual-coil architecture providing flexible series or parallel connection options
- Shielded construction to minimize electromagnetic interference
- Surface-mount design optimized for automated PCB assembly
Applications
- DC-DC converter input/output filtering
- Power supply ripple reduction circuits
- Multi-phase power distribution systems
Procurement Notes
Verify the specific manufacturer part number against official TT Electronics documentation to confirm electrical ratings and pinout compatibility. Ensure the procurement source provides valid traceability data. Confirm that the component meets required environmental standards for the intended operating temperature range before finalizing orders.
Selection Notes
Select this component when dual-inductor functionality is required in a compact footprint. The 47 µH parallel value suits moderate energy storage needs. Verify that the 5.2 A current rating aligns with peak load requirements. Consider the 12.5 mm square package size for board space constraints compared to single-coil alternatives.
Part Context
This component belongs to the HM78D series of coupled inductors from TT Electronics/BI Magnetics. The series offers various inductance values and current ratings tailored for power management applications. The HM78D-128470MLFTR specifically addresses designs requiring coupled magnetic elements in a standardized surface-mount form factor.
Replacement Considerations
Direct substitutes may include other coupled inductors with similar 47 µH parallel inductance and comparable current ratings. Verify mechanical footprint compatibility and thermal performance characteristics before substitution.
