Filter inductor for DC-DC and signal-line smoothing
The Murata LQH32CH2R2M23L is a 2.2 µH drum-core wirewound inductor in the LQH32 series, surface-mounted in a 1210 (3225 metric) footprint. Its 600 mA current rating and 130 mOhm DCR suit it for DC-DC converter output filters and signal-line noise suppression where the DC bias stays below that current.
What the three key specs mean for your BOM line
Inductance is 2.2 µH ±20% at 1 MHz test frequency — the tolerance is wide enough that the filter corner frequency shifts by ±20 % from the nominal RC time constant; a downstream regulator with good loop margin handles it without stability issues. Rated 600 mA continuous — the DCR of 130 mOhm produces a 78 mW self-heating loss at full current, well within the 85 °C ambient ceiling for this grade. Self-resonant frequency is 64 MHz — above that the impedance becomes capacitive, so this part filters cleanly up to the low-VHF band. For a 2.2 µH value, 64 MHz SRF is typical of a ferrite-core wirewound in this footprint.