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Product Detailed Parameters
- Description：INDUCT ARRAY 2 COIL 1MH SMD
- Series：HM78D
- Mfr：TT Electronics/BI Magnetics
- Package：Cut Tape (CT)
- Number of Coils：2
- Inductance - Connected In Parallel：1 mH
- Inductance - Connected In Series：4.8 mH
- Tolerance：±10%
- Current Rating - Parallel：600 mA
- Current Rating - Series：300 mA
- DC Resistance (DCR) - Parallel：1.415Ohm
- DC Resistance (DCR) - Series：5.66Ohm
- 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：1.1 A
- Current Saturation - Series：560 mA
- Ratings：-
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Overview
The HM78D-128102KLFTR is a shielded surface mount coupled inductor from the HM78D series, manufactured by TT Electronics/BI Magnetics. It features two coils with an inductance of 4.8 mH when connected in series and 1000 µH in parallel, offering a tolerance of ±10%. The component supports a maximum DC current of 1.1 A and has a maximum DC resistance of 1.415 Ohms. Its physical dimensions are 12.5 mm in length, 12.5 mm in width, and 8.05 mm in height, designed for SMD/SMT mounting.
Feature Summary
- Shielded two-coil array design for noise suppression
- Surface mount construction for automated assembly
- High inductance values suitable for energy storage
Applications
- Power filtering circuits
- Energy storage applications
- Noise suppression in electronic systems
Procurement Notes
Verify the specific suffix 'K' indicates the 10% tolerance variant distinct from standard 'M' tolerance parts. Confirm availability status as distribution channels may vary. Ensure the ordering quantity aligns with manufacturer packaging requirements. Cross-reference the datasheet for precise thermal and electrical limits before finalizing procurement.
Selection Notes
Select this component when high inductance in a compact footprint is required. The 10% tolerance provides tighter control than standard variants. Evaluate the 1.1 A current rating against peak load requirements. Consider the 8.05 mm height for vertical space constraints in the target enclosure design.
Part Context
This part belongs to the HM78D series of surface mount coupled inductors. The series offers various inductance values and tolerances. The '128' code typically denotes the 12.5 x 12.5 mm package size. The 'K' suffix specifies the 10% tolerance, differentiating it from the more common 20% tolerance 'M' suffix parts within the same family.
Replacement Considerations
Direct substitutes include other shielded coupled inductors with similar 4.8 mH series inductance and 1.1 A current ratings. Verify pin compatibility and mechanical dimensions before substitution. Alternative manufacturers should be evaluated for equivalent shielding effectiveness and saturation characteristics.
