27 µH wirewound in the 1812 footprint
The Murata LQH43MN270J03L is a drum-core wirewound inductor in the LQH43 series, offering 27 µH ±5% inductance in a standard 1812 (4532 metric) surface-mount package. Rated for 300 mA DC with a maximum DC resistance of 1.1 Ω, this part suits low-to-moderate current filtering and decoupling roles where the 27 µH value sets the corner frequency. The unshielded construction means the magnetic field extends beyond the component body — keep sensitive traces or adjacent inductors at least one part width away to avoid coupling.
Frequency response and thermal limits
Self-resonant frequency is 14 MHz; above this point the impedance becomes capacitive, so the useful filtering band stops well below that ceiling — typically derate to one-third the SRF for a safe inductive region. Quality factor is 35 at 1 MHz test frequency, giving a reasonable selectivity for tuned circuits in that range.