22 µH for power rail filtering
The Murata LQH32PN220MN0L is a 22 µH shielded wirewound inductor in the LQH32 series, built for DC-DC converter input/output filtering and power-line smoothing where a compact 1210 footprint is needed. Rated at 450 mA continuous current with a saturation current floor of 500 mA, this part handles the ripple current of a moderate-load buck or boost stage without saturating the ferrite core.
What the ratings mean for the BOM
The 972 mOhm max DCR sets the copper loss: at 450 mA, I²R dissipation is roughly 0.2 W, which the 1210 body must sink into the board copper — a factor when the inductor sits near a hot regulator or in a confined ambient. Self-resonant frequency is 20 MHz, so the inductor behaves inductively well below that — usable for switching converters switching at 1–2 MHz or lower, where the SRF is at least a decade above the fundamental. Shielded construction with ferrite core contains the magnetic field, reducing EMI coupling to adjacent traces and components — a practical advantage when routing a noisy power rail near a sensitive analog section on the same board.