6.8 µH wirewound for DC-DC filtering and bias-T circuits
The Murata LQH43MN6R8K03L is a drum core wirewound inductor in the LQH43 series, rated 6.8 µH ±10% at 1 MHz test frequency.
Unshielded construction and layout considerations
This is an unshielded inductor, meaning the magnetic field radiates from the core. In a dense PCB layout, keep adjacent traces and sensitive components at least a few millimeters away to avoid coupling noise into the inductor's field. The 31 MHz self-resonant frequency means the part behaves inductively up to roughly 30 MHz — above that, parasitic capacitance dominates and the impedance drops. The ferrite core material gives stable inductance over temperature and DC bias, though the unshielded design means the inductance drops less under bias than a shielded part would.