10 µH wirewound in a 1812 footprint
The Murata LQH43NH100J03L is a drum core, wirewound inductor in the LQH43 series, housed in a 1812 (4532 Metric) surface-mount package. It delivers 10 µH inductance at 1 MHz test frequency, rated for 480 mA continuous current with a maximum DC resistance of 240 mOhm.
Current rating and DCR trade-off
The 480 mA current rating is the saturation or temperature-rise limit — at this current the inductance drop or self-heating stays within the design margin. The 240 mOhm max DCR sets the I²R conduction loss at 55 mW at full rated current, a manageable figure for the 1812 package's thermal dissipation. Unshielded construction means the magnetic field extends beyond the component body — keep sensitive traces or other magnetics at least one package width away to avoid coupling. The ferrite core material provides stable inductance over frequency up to the 23 MHz self-resonant point. Q factor of 35 at 1 MHz indicates moderate energy storage efficiency at that frequency; above self-resonance the inductor behaves capacitively and the Q drops off rapidly.
AEC-Q200 qualification means the part has passed automotive-grade stress tests including thermal shock, moisture resistance, and mechanical vibration — it is approved for use in under-hood and cabin electronics without additional qualification by the Tier-1 integrator.