1 µH, 1.08 A — the DC bias limit and DCR drive the fit
The LQH43CN1R0M03L is a 1 µH drum-core wirewound inductor from Murata's LQH43 series, rated for 1.08 A continuous current with a maximum DC resistance of 80 mOhm. The 1.08 A rating is the saturation-limited DC current — push beyond it and inductance collapses, so budget headroom for the peak current in your DC-DC converter or filter. The 80 mOhm DCR at full load drops about 93 mV and dissipates roughly 93 mW of I²R heat inside the 1812 body. For a 1 µH part at this current, the copper loss dominates the core loss at switching frequencies below a few megahertz.
Unshielded construction — flux leakage matters for layout
This is an unshielded drum-core design — the ferrite core is open on the sides, so magnetic flux couples into nearby traces and components. Keep sensitive analog or RF circuitry at least one part-width away, or expect crosstalk. The self-resonant frequency of 100 MHz means it behaves as an inductor cleanly up to roughly 30-50 MHz in practice; above that parasitic capacitance takes over. The ±20% tolerance is typical for power-grade ferrite inductors — expect the actual inductance at DC bias to be at the low end of the band, especially near 1.08 A.