What the AEC-Q200 rating means for your BOM
This Murata LQH2HNH270J03L is a shielded drum-core wirewound inductor qualified to AEC-Q200, the automotive-grade passive-component stress test standard.
27 µH at 90 mA — the fit decision
Rated 27 µH ±5% with a DC resistance of 3.15 Ω and a current rating of 90 mA. The DCR sets the I²R self-heating floor; at 90 mA the copper loss is about 25 mW, which is negligible in a 1008 package but matters if you are stacking multiple inductors in a dense power rail. The self-resonant frequency is 19 MHz, so this part stays inductive well above the switching frequency of most DC-DC converters in automotive infotainment or sensor modules. The shielded construction keeps flux from coupling into adjacent traces or components, which is the main reason to pick a shielded part over an unshielded one in a mixed-signal layout.