12 µH, 380 mA — power rail filtering in a compact 1812 footprint
The Murata LQH43NN120J03L is a drum core wirewound inductor from the LQH43 series, rated at 12 µH ±5% with a continuous current handling of 380 mA.
Unshielded construction — where coupling matters
This is an unshielded inductor. In a dense mixed-signal layout, the stray field from the drum core can couple into adjacent traces or components — keep a keep-out zone around the part or route sensitive signals on the opposite layer. The self-resonant frequency of 21 MHz means the inductance holds its value up to roughly 7–10 MHz before parasitic capacitance starts to dominate; above that the impedance rolls off.
Murata lists the LQH43NN120J03L as Active.