2.2 µH wirewound in a 1812 footprint
The Murata LQH43NH2R2J03L is a 2.2 µH drum core wirewound inductor in the LQH43 series, packaged in an 1812 (4532 Metric) surface-mount footprint. Rated for 1 A continuous current with a maximum DC resistance of 58.8 mOhm, this part handles moderate power rail filtering and DC-DC converter output smoothing without excessive copper loss. The ferrite core construction and unshielded design keep the component cost low, but the open magnetic field means adjacent traces need spacing to avoid coupling — a consideration for dense PCB layouts.
AEC-Q200 grade and temperature range
AEC-Q200 qualification certifies this inductor for automotive stress levels — vibration, thermal shock, and humidity bias — making it a fit for under-hood electronics, infotainment, and ADAS sensor power supplies.
Frequency response and Q factor
Self-resonant frequency of 62 MHz means the inductor behaves inductively up to that point — above it, parasitic capacitance dominates and the impedance rolls off. For switching converters switching below 6 MHz, this is well clear of the resonance. A Q factor of 20 at 1 MHz indicates moderate energy storage efficiency at that frequency — adequate for general-purpose filtering but not optimized for narrow-band resonant circuits where higher Q is preferred. Inductance is tested at 1 MHz, which is the standard reference frequency for this value range — the actual inductance at DC or at the switching frequency will be within the ±5% tolerance band.