39 µH at 110 mA — DC bias and self-heating check
The LQH32MN390J23L is a 39 µH drum core wirewound inductor from Murata's LQH32 series, rated for 110 mA continuous current.
Q factor and self-resonant frequency — usable band
A minimum Q of 40 at 1 MHz and a self-resonant frequency of 11 MHz define the useful operating band. Below SRF the inductor behaves as an inductor; above it the parasitic capacitance dominates and the impedance rolls off. For a 39 µH part, 11 MHz SRF is typical for this core geometry — it means the inductor is clean for switching frequencies up to roughly 1-2 MHz, where the Q is still high and the impedance is inductive.
1210 footprint and unshielded construction — layout considerations
Unshielded drum core means the magnetic field extends beyond the body; keep sensitive traces, ground planes, or adjacent magnetics at least one part-width away to avoid coupling. The ferrite core material is specified, so the inductance curve vs DC bias is typical for a ferrite drum — expect the inductance to drop off above the rated current.