390 µH drum core wirewound inductor for signal filtering
The Murata LQH43NN391J03L is a drum core wirewound inductor in the LQH43 series, unshielded, with a ferrite core and a nominal inductance of 390 µH at 1 MHz test frequency. Rated for 90 mA continuous current with a maximum DC resistance of 9.7 Ohm, this part suits low-current DC-DC converter output filters or signal-line chokes where the inductance value and DCR trade-off is acceptable. The self-resonant frequency of 3.3 MHz and Q factor of 40 at 796 kHz define the useful band — above SRF the impedance becomes capacitive, so the inductor is best applied below 2–3 MHz.
1812 footprint and surface-mount integration
Available in tape-and-reel or cut-tape packaging — the TR suffix on the order code indicates reel quantity for automated pick-and-place; the CT option suits prototype or low-volume builds.