3.3 µH wirewound in a standard 1812 footprint
The Murata LQH43CN3R3M03L is a drum-core, wirewound inductor in the LQH43 series, delivering 3.3 µH ±20% in an unshielded 1812 (4532 Metric) surface-mount package. Rated for 800 mA continuous current with a maximum DC resistance of 130 mOhm, the part suits low- to moderate-current filtering and DC-DC converter output stages where the 3.3 µH value provides the needed ripple attenuation.
Self-resonant ceiling and temperature grade
The self-resonant frequency of 47 MHz defines the upper limit of the inductive region — above this frequency the impedance becomes capacitive, so the inductor is usable for switching regulators switching below roughly 4.7 MHz (one-tenth of SRF as a rule of thumb) and for EMI filtering up to the VHF band.