220 µH at 110 mA — DC bias and loss budget
The LQH43MN221K03L: Rated at 220 µH ±10% with a 110 mA DC current limit. The 5.4 ohm maximum DCR sets the I²R conduction loss: at full rated current the self-heating is roughly 65 mW, which is manageable in most 1812 board layouts but should be factored into the thermal budget if ambient runs near the 85°C ceiling.
Frequency range — Q and self-resonance
The Q factor is 40 at 796 kHz, and the self-resonant frequency is 4.5 MHz. This means the inductor behaves as a pure inductance up to roughly 1–2 MHz; above that the parasitic capacitance starts to dominate, and the impedance becomes capacitive past 4.5 MHz. Use it for switching frequencies in the low hundreds of kHz to a few MHz — typical for DC-DC output filters or EMI suppression in that band.
1812 footprint — pick-and-place ready
The unshielded ferrite drum core construction means the magnetic field is not contained — adjacent traces carrying sensitive analog signals should be kept at least one package width away to avoid coupling.
Industrial temperature range — not AEC-Q rated
This is the standard industrial temperature grade; the part is not qualified to AEC-Q200 automotive stress tests. For under-hood or cabin electronics requiring extended temperature or vibration qualification, look at Murata's automotive-grade LQH43 series variants (AEC-Q200 listed).