4.7 µH shielded inductor for DC-DC rail filtering
The Murata LQH32PN4R7NN0L is a shielded wirewound power inductor in the LQH32 series, built on a ferrite drum core. It delivers 4.7 µH ±30% with a 1 A continuous current rating and a matching 1 A saturation current (Isat) — the inductor does not derate its own saturation limit below the rated DC current.
DCR and saturation — the load-range ceiling
DC resistance is 180 mOhm, which sets the copper-loss floor for a given load current: at 1 A the I²R loss is 180 mW, and the part's 85 °C ambient limit means that loss must be dissipated without exceeding the winding temperature. The self-resonant frequency is 40 MHz, well above typical DC-DC switching frequencies (300 kHz–2 MHz), so the inductive impedance stays dominant across the operating band. Operating range is -40 °C to 85 °C, covering industrial ambient conditions.