What this 100 µH wirewound does on the board
The Murata LQH43MN101J03L is a drum-core wirewound inductor in the LQH43 series, rated 100 µH at 1 MHz test frequency with ±5% tolerance.
Unshielded construction and the self-resonant ceiling
This is an unshielded inductor, meaning the magnetic field couples into nearby traces and components — keep a clearance gap from sensitive analog or RF paths on the layout. The self-resonant frequency is 6.8 MHz; above that the inductor behaves capacitively, so it is a fit for DC-DC converters and filtering circuits switching below 2-3 MHz where the impedance stays inductive.
Q factor and DCR — the loss trade-off
Q is 40 at 796 kHz, which is typical for a ferrite-core wirewound in this inductance range — the loss is dominated by the winding resistance, not the core. The 2.5 Ohm max DCR means the DC power loss at 160 mA is 64 mW; for a power rail filter the efficiency hit is small, but for a high-Q resonant tank the series resistance limits the loaded Q.