22 µH shielded wirewound for DC-DC filtering
The Murata LQH32PB220MNCL is a drum-core wirewound inductor from the LQH32 series, rated 22 µH ±20% at 1 MHz test frequency. It handles 270 mA continuous current and saturates at 650 mA, with a maximum DCR of 822 mOhm — the DC resistance figure sets the copper loss at full rated current to about 60 mW, well within the part's self-heating budget for a 1210 footprint.
Shielded ferrite core and SRF margin
The ferrite core is fully shielded, which keeps the magnetic field contained and avoids crosstalk to adjacent traces or components — important when the inductor sits near a sensitive analog front-end or a tightly packed DC-DC converter. The self-resonant frequency is 20 MHz, well above the typical 1–4 MHz switching frequencies of small buck converters, so the inductor behaves as a pure inductive element in that band. The 125°C ceiling is the component's own maximum; derating the current above 85°C is standard practice for ferrite-core inductors.
1210 SMD footprint and sourcing posture
Murata lists the LQH32PB220MNCL as Active.