82 µH wirewound for automotive noise filtering
The Murata LQH32NZ820J23L is a drum-core wirewound inductor in the LQH32 series, delivering 82 µH ±5% inductance in a 1210 (3225 metric) surface-mount package. Rated at 70 mA with a maximum DC resistance of 6.2 Ω, it targets power-line filtering and decoupling in automotive modules where board space is tight.
Parametric fit: inductance, current, and self-resonance
82 µH at 1 MHz test frequency with a self-resonant frequency of 8.5 MHz. The Q factor of 40 at 1 MHz gives a reasonable selectivity for band-pass or tank circuits at low frequencies, though the primary use case is DC-bias filtering where the inductance holds up under the rated 70 mA. The 6.2 Ω DCR sets the I²R loss at 70 mA to roughly 30 mW — negligible in most automotive loads, but worth checking if the inductor sits in a high-ambient-temperature zone where self-heating adds to the thermal budget. Operating range is -40°C to 105°C, covering the cabin and most engine-bay locations short of the exhaust manifold. Unshielded construction means the stray field couples into nearby traces — keep sensitive analog or RF routing at least one package width away from the 1210 footprint. Ferrite core material gives stable inductance over temperature but saturates sharply above the rated current; the 70 mA figure is the saturation-limited rating, not the thermal limit.
Lifecycle and supply posture
Tape-and-reel packaging — 2,000 pieces per reel typical for 1210 size. The part is not moisture-sensitive per the standard MSL-1 rating for ferrite inductors, so no dry-bake step is needed before reflow. Store the reels in a dry environment below 40°C to keep the carrier tape from curling.