33 µH wirewound inductor for power and signal filtering
The Murata LQH43MN330K03L is a drum core wirewound inductor from the LQH43 series, delivering 33 µH ±10% inductance in an 1812 (4532 Metric) surface-mount package. Rated for 270 mA continuous current with a maximum DC resistance of 1.2 Ohm, this part suits low-to-moderate current filtering and DC-DC converter output ripple suppression where the 33 µH value provides the needed impedance at switching frequencies.
Frequency response and Q factor
With a self-resonant frequency of 12 MHz and a Q factor of 35 measured at 1 MHz, the inductor maintains its inductive behavior well into the low-MHz range, making it effective for EMI filtering and tuned circuits in that band. The ferrite core material and unshielded construction mean the magnetic field radiates outside the component — allow clearance from adjacent traces and other inductors to avoid cross-coupling in dense PCB layouts.