180 µH unshielded wirewound for DC-DC filter duty
Murata LQH43MN181K03L is a drum-core wirewound inductor in the LQH43 series, rated 180 µH ±10% at 1 MHz test frequency. The 120 mA current rating and 4.5 Ohm max DCR set the usable load range for a buck or boost choke — the I²R loss at full current is about 65 mW, well within the 1812 package dissipation at 85 °C ambient. Self-resonant frequency is 5 MHz, so effective filtering rolls off below that point — above 5 MHz the inductor behaves capacitive. The ferrite core and unshielded construction mean the magnetic field extends outside the package; keep sensitive traces or other magnetics at least one package width away.
Active production — no last-time-buy pressure
Lifecycle status is Active per Murata's latest product disposition. No end-of-life notice or successor part has been issued for this order code.