Last Buy — what it means for your BOM
Murata lists the LQH31MN5R6K03L as Last Buy — the manufacturer has stopped regular production and is fulfilling final orders within a defined window. If your BOM calls for this exact 5.6 µH unshielded wirewound inductor, the procurement window is closing.
Parametric fit — 5.6 µH, 115 mA, 2.34 Ohm DCR
Rated 5.6 µH at 1 MHz test frequency with ±10% tolerance. The 115 mA current rating is the DC current at which the inductance typically drops by 10% — stay within this for nominal performance. Maximum DC resistance of 2.34 Ohm sets the copper loss; at 115 mA the I²R loss is about 31 mW, negligible in most surface-mount designs. Unshielded drum-core wirewound construction with a ferrite core. The self-resonant frequency of 28 MHz defines the upper frequency where the inductor behaves inductively — above that, parasitic capacitance dominates. Q factor of 35 at 8 MHz indicates moderate ac losses at that frequency.