82 µH at 170 mA — where the current rating governs the fit
The LQH43MN820J03L is a Murata drum-core wirewound inductor in the LQH43 series, rated 82 µH ±5% with a 170 mA continuous current limit and a 2.2 Ohm max DC resistance. At 170 mA, the DCR drops 0.37 V and dissipates 64 mW of copper loss — the self-heating stays low in a standard 1812 footprint, but the current rating is the hard ceiling for DC bias before inductance rolls off.
Unshielded construction and self-resonant frequency
Unshielded means the magnetic field couples into nearby traces or components — keep a keep-out zone around this inductor or use a shielded alternative if the layout is dense. The self-resonant frequency is 7.5 MHz; above that the device behaves capacitively and stops acting as an inductor. The Q factor is 35 at 1 MHz, typical for a ferrite-core wirewound in this package size.
1812 SMD footprint and operating range
The ferrite core and wirewound construction suit general-purpose filtering and DC-DC converter output chokes.
Active production — no end-of-life signal
The part is a current-production catalog item, sourced through franchised and independent distribution.