What the 1.41 A rating means on a power rail
The LQH43PB1R0N26L is a 1 µH shielded wirewound inductor rated for 1.41 A continuous current, with a saturation current of 3.4 A — the core holds its inductance well into the overload region before it rolls off. DC resistance is 31.2 mOhm max, so at 1.41 A the I²R loss is about 62 mW — negligible in most power-stage layouts, but worth checking if the inductor sits in a tightly enclosed module with no airflow. Self-resonant frequency is 100 MHz, which means the inductive impedance holds up well into the tens of MHz before parasitic capacitance starts to dominate — fine for buck converters switching at 1–2 MHz, but not the right part for a 50 MHz RF bias tee.
Package and temperature fit for a 24/7 line
1812 (4532 Metric) body, 4.50 x 3.20 mm footprint, seated height 2.80 mm max — the 1812 land pattern is standard, and the height keeps it under most low-profile heatsinks or enclosure lids. Operating temperature range -40 to +125 °C covers industrial and automotive under-hood ambient; the ferrite core material is stable across that band, though inductance tolerance is ±30% over temperature and current. Shielded construction means the magnetic field is contained within the ferrite shell — no crosstalk into adjacent traces or sensitive analog loops on the same board layer.