290 nH wirewound in 1206 — what the ratings mean for your filter
The Murata LQH31HNR29J03L is a drum-core, wirewound ferrite inductor in the LQH31 series, wound on a ferrite core and left unshielded. The 290 nH value at 1 MHz test frequency, ±5% tolerance, targets RF and high-frequency decoupling where tight inductance accuracy matters. Self-resonant frequency is 360 MHz, and Q is 60 at 100 MHz — this inductor maintains its inductive impedance well into the VHF band, making it suitable for impedance-matching networks, tank circuits, or supply-line filtering up to several hundred MHz before parasitic capacitance dominates.
1206 footprint and rework reality
No exposed metal terminations on the top — pin 1 orientation is unambiguous from the part marking.
For a BOM line that depends on this 290 nH ±5% value in a 1206 footprint, the Last Buy status means you either secure lifetime buy quantities now or plan a qualification cycle for a replacement. The unshielded drum-core construction is common across many vendors, but the specific inductance tolerance and self-resonant frequency should be matched in any substitute.