What the 82 µH rating means for your filter or DC-DC stage
The Murata LQH43NN820K03L is a drum core wirewound inductor in the LQH43 series, delivering 82 µH ±10% in an unshielded 1812 (4532 Metric) surface-mount package. That 82 µH value is the inductance at 1 MHz test frequency — the sweet spot for power supply output filters, LC tank circuits, and DC-DC converter energy storage where the switching frequency lands in the low-MHz range. The self-resonant frequency of 7.5 MHz tells you where the inductor stops behaving like an inductor and starts looking capacitive; keep your switching frequency below that to avoid efficiency drop-off.
Footprint and hand-solderability
The 1812 body (4.50 mm x 3.20 mm, seated height 2.80 mm) is a standard SMD size that's friendly for both reflow and hand soldering — a fine-tipped iron and some flux will get it down on a prototype board without a hot-air station. The unshielded construction means you'll want to keep magnetic-sensitive traces (like feedback loops or audio paths) a few millimeters away, but for general filtering it's a non-issue. The ferrite core material gives stable inductance over temperature and current, typical for drum core wirewound parts in this class.
That means it's safe to specify for new designs and there's no last-time-buy clock ticking.