The Murata LQH3NPZ100MGRL is a 10 µH shielded wirewound inductor in the LQH3 series, built on a ferrite core and qualified to AEC-Q200 for automotive electronics.
Ratings that drive the BOM decision
Rated 670 mA continuous with a saturation current floor of 570 mA — the 100 mA gap between the two means the inductor will start to lose inductance before the rated current is reached, so the design must stay below the saturation limit in peak-load transients. DC resistance of 336 mOhm max sets the I²R conduction loss: at 670 mA the loss is 0.15 W, which in a 3×3 mm package drives a temperature rise that must be accounted for in the thermal budget of a dense automotive ECU. The 20 MHz self-resonant frequency means the component behaves as an inductor up to that frequency — above 20 MHz parasitic capacitance dominates, making it unsuitable for filtering above that range.
Shielded construction reduces magnetic flux leakage into adjacent traces, which matters when the inductor sits next to a sensitive analog or RF section on the same PCB.
Lifecycle reality for procurement
For a BOM that already qualifies this part, the procurement action is to secure the last-time-buy quantity or to identify a drop-in alternative before the remaining independent stock is depleted.