330 nH in a 1206 footprint — what the ratings mean for your RF filter or DC-DC snubber
The Murata LQH31MNR33K03L is a drum-core wirewound inductor in the LQH31 series, packing 330 nH ±10% into a standard 1206 (3216 Metric) surface-mount package. Its 230 mA current rating and 450 mOhm DCR set the DC bias limit and conduction loss for the trace or supply rail it feeds.
Self-resonant frequency and Q — where this inductor stops being an inductor
With a self-resonant frequency of 250 MHz and a Q of 30 at 25 MHz, this part behaves as a pure inductance up to roughly 200 MHz. Above SRF the impedance turns capacitive, so it suits low-pass filter stages and DC-DC converter snubbers operating in the VHF band, not UHF.
Unshielded construction — placement matters on a mixed-signal board
The unshielded ferrite core means magnetic flux couples into nearby traces and components. On a board with sensitive analog or RF front-ends, keep a keep-out zone of at least 2–3 mm around the part, or switch to a shielded variant in the same LQH31 family if cross-talk becomes an issue.
Temperature range and board-fit reality
The 1206 footprint reflows on standard FR-4 with no special paste or profile adjustments.