Murata has placed the LQH31MN120K03L on Last Buy status. This means the manufacturer will accept final orders for a limited window, after which the part will be discontinued. For any existing BOM that uses this inductor, the procurement team should secure the remaining lifetime volume or qualify a replacement before the cutoff.
12 µH, 95 mA — where this fits in a supply rail
The LQH31MN120K03L is a 12 µH unshielded wirewound inductor in the LQH31 series from Murata, rated for 95 mA continuous current. The 3.51 Ohm maximum DC resistance means at full rated current the I²R loss is about 32 mW — acceptable for low-power DC-DC converter input or output filtering, but not for high-efficiency designs where DCR directly impacts conversion efficiency. The self-resonant frequency is 18 MHz, and the Q factor is 35 at 5 MHz. This tells you the inductor behaves as a pure inductance well below 18 MHz; above that, parasitic capacitance dominates. For a switching regulator switching at 1–2 MHz, the 18 MHz SRF gives plenty of margin — the inductor will not self-resonate in-band.
1206 footprint, unshielded — board-fit considerations
The unshielded construction means magnetic flux radiates from the core — keep sensitive analog or RF traces at least a few millimeters away to avoid coupling noise into adjacent circuits. It is a general-purpose grade — not qualified to AEC-Q200, so avoid automotive powertrain or safety-critical applications without additional qualification data.