15 µH, 520 mA — what the ratings mean for a DC-DC rail
The LQH32PN150MN0L is a 15 µH shielded wirewound inductor in Murata's LQH32 series, built for surface-mount power supply filtering on a 1210 (3225 Metric) footprint. Rated 520 mA continuous with a DCR of 684 mOhm max — the copper loss at full load is I²R = 0.52² × 0.684 ≈ 185 mW, which the ferrite core and drum construction dissipate without saturating up to 600 mA saturation current. The self-resonant frequency sits at 20 MHz, so the inductor behaves as an inductor well below that point — it is a fit for switching regulators switching in the hundreds of kHz to a few MHz range, where the SRF does not limit the effective inductance. Shielded construction means the magnetic field is contained within the ferrite core — adjacent traces or other inductors on the same board see minimal coupling, which matters when the inductor sits near a sensitive analog rail or a radio front-end.
Board-fit and reflow profile
Operating temperature range is -40°C to 85°C, covering industrial ambient but not extended to 105°C or 125°C — derate the current above 85°C per the manufacturer's curve if the inductor sees self-heating plus ambient near the ceiling.