15 µH wirewound in a 1812 footprint
The Murata LQH43NN150K03L is a 15 µH drum core wirewound inductor in the LQH43 series, housed in an 1812 (4532 Metric) surface-mount package.
Self-resonant frequency and Q factor
The self-resonant frequency is 19 MHz, meaning the inductor behaves inductively up to that point; above it, parasitic capacitance dominates and the impedance rolls off. For a buck converter switching at 1–2 MHz, this part offers clean filtering headroom. A Q factor of 35 at 1 MHz indicates moderate energy storage efficiency at that frequency — adequate for general-purpose filtering and decoupling in power supplies and RF bias-T circuits where the operating frequency stays well below self-resonance.
Unshielded construction and layout considerations
This is an unshielded inductor, so its magnetic field radiates into the surrounding PCB area. Keep sensitive analog traces or high-impedance nodes at least two board-layer thicknesses away from the component to avoid coupling.