Shielded 2.2 µH ferrite core in a 1210 footprint
The Murata LQH32PB2R2NNCL is a shielded drum-core wirewound inductor from the LQH32 series, built on a ferrite core and housed in the standard 1210 (3225 metric) surface-mount package. Inductance is 2.2 µH with a ±30% tolerance tested at 1 MHz — the wide tolerance band suits DC-DC converter input/output filters where the absolute value matters less than the saturation and DCR limits. The shield reduces flux leakage into adjacent PCB traces, which matters when the inductor shares a tight layout with a sensitive analog front-end or RF section.
Current rating, DCR, and saturation ceiling
Rated for 910 mA continuous current with a maximum DC resistance of 76.8 mOhm — at full rated current the I²R loss is about 64 mW, which the 1210 body dissipates without significant self-heating in still air. The saturation current (Isat) is 2 A — the inductor holds its inductance up to this peak current before the ferrite core saturates and the inductance collapses. For a buck converter with a 1 A load transient, the inductor stays well below the saturation knee. Self-resonant frequency is 70 MHz — above this frequency the parasitic capacitance across the winding dominates and the component behaves as a capacitor. That leaves a clean inductive region from DC through the 10 MHz switching range of most mid-frequency DC-DC converters.
The ferrite core material maintains its permeability across this band without the steep drop-off typical of powdered-iron cores above 100 °C.