22 µH, 320 mA — what these ratings mean for your board
The Murata LQH43MN220K03L is a drum-core wirewound inductor in the LQH43 series, delivering 22 µH ±10% at a rated current of 320 mA. The unshielded ferrite core means the magnetic field is not contained within a magnetic shield — adjacent traces or components within a few millimeters may pick up stray flux, so keep sensitive analog or RF circuitry at least one body width away.
1812 footprint — board-fit and assembly
The footprint matches standard 1812 land patterns; the 2.80 mm height is low enough to clear most enclosures but tall enough that a pick-and-place nozzle with a 4 mm ID cup handles it cleanly. Available in tape and reel (TR) or cut tape (CT) — the reel format suits volume reflow assembly; cut tape works for prototype builds or small-batch runs where you do not want to commit to a full reel.
Frequency band — where this inductor works best
The self-resonant frequency is 15 MHz — above this frequency the inductor behaves capacitively, so it is effective as a filter or choke up to roughly 10 MHz. The Q factor of 35 at 1 MHz tells you the ratio of stored energy to dissipated energy at that test frequency; a Q of 35 is moderate — fine for power rail filtering and DC-DC converter output chokes, but not optimized for high-Q resonant tank circuits.