330 µH wirewound for filtering and energy storage
The LQH43CN331K03L is a Murata drum-core wirewound inductor in the LQH43 series, rated 330 µH ±10% with a 100 mA continuous current limit. The 6.8 Ohm max DC resistance sets the I²R loss at full load — about 68 mW dissipated in the part, which is manageable in the 1812 footprint but worth checking against your thermal budget if the inductor sits near other heat sources. The self-resonant frequency of 3.6 MHz (tested at 1 MHz) means this inductor behaves as an inductor well below that point; above SRF the impedance turns capacitive. For a buck converter switching at 500 kHz or a pi-filter smoothing ripple at a few hundred kHz, you have plenty of margin. Push it past 2 MHz and the effective inductance starts rolling off.
1812 SMD package and board integration
The ferrite core is unshielded, so keep sensitive traces or other magnetics at least a couple of millimetres away to avoid coupling. Standard reflow profile for a ferrite drum-core; no special bake requirements unless the reel has been exposed to humidity beyond the floor-life spec. The inductance and current ratings are specified at room temperature; expect the DCR to rise by about 0.4% per °C above 25°C, so at 85°C ambient the winding resistance is roughly 8.2 Ohm, increasing the copper loss by about 20%.