12 µH shielded wirewound for automotive DC-DC filtering
The Murata LQH2HNH120J03L is a 12 µH ±5% shielded wirewound inductor in the LQH2 series, qualified to AEC-Q200 for automotive applications. The 140 mA current rating and 1.3 Ohm DCR define the DC bias point and conduction loss for a given load. Shielded ferrite core construction contains the magnetic flux, reducing EMI coupling to adjacent traces or components on the same board — a requirement in dense automotive ECU layouts where switching noise from a buck converter must not couple into a sensor front-end.
1008 package and self-resonant frequency
The 27 MHz self-resonant frequency sets the upper bound for effective filtering — above SRF the inductor behaves capacitively, so this part suits switching frequencies well below 27 MHz, typical for automotive DC-DC converters in the 1-4 MHz range. Inductance is tested at 1 MHz, the standard test frequency for this value range. The ±5% tolerance holds the inductance within a tight band for filter cutoff stability across temperature and bias current.