1 mH inductance, 50 mA current rating — BOM-fit parameters
The Murata LQH43NN102J03L is a drum core, wirewound inductor in the LQH43 series, offering 1 mH inductance with ±5% tolerance. The 50 mA current rating sets the DC bias limit — exceeding it drives the core into saturation and collapses the inductance. The 25 Ohm max DCR means at full rated current the resistive loss is 62.5 mW, a factor in thermal budgeting for dense SMD layouts.
1812 SMD package and unshielded construction
The unshielded construction means the magnetic field radiates — adjacent traces or components on the same layer should be kept clear to avoid coupling. Ferrite core material supports the 1 mH value in this footprint.