820 µH in a 1812 footprint
The Murata LQH43NN821K03L is an 820 µH drum core wirewound inductor in the 1812 (4532 Metric) SMD package. It is rated for 60 mA continuous current with a 20.5 Ohm max DCR. The unshielded ferrite core construction gives a self-resonant frequency of 2.2 MHz, which sets the upper bound for the inductor's useful impedance in filter or DC-DC applications.
What the ratings mean on the bench
The 60 mA current rating is the DC bias current at which the inductance typically drops by 10% — push beyond that and the inductance falls off quickly as the core saturates. The inductance is tested at 1 kHz, but the self-resonant frequency at 2.2 MHz tells you where the impedance peaks — above that the part looks capacitive.