27 µH wirewound in the LQH43 family
The Murata LQH43NH270J03L is a 27 µH drum-core wirewound inductor in the LQH43 series, built on a ferrite core and packaged in the 1812 (4532 Metric) footprint. The unshielded construction and a self-resonant frequency of 14 MHz suit it for DC-DC converter input/output filtering and power-line decoupling where the switching frequency stays below that resonance.
Parametric fit and test conditions
Inductance is tested at 1 MHz with a ±5% tolerance; the Q factor is 35 minimum at the same 1 MHz test frequency. The 720 mOhm DCR is the maximum at room ambient — the winding resistance increases with temperature per the copper temperature coefficient, so the I²R loss budget should be calculated at the 125°C upper limit.