Parametric fit for the BOM line
The LQH31MNR47K03L is a 470 nH drum-core wirewound inductor from Murata's LQH31 series, rated for 215 mA continuous current with a DC resistance of 830 mOhm — the DCR figure governs the I²R heating in the power path, so a 215 mA load at 25°C ambient dissipates roughly 38 mW in the winding. Self-resonant frequency is 200 MHz and Q is 30 at 25 MHz, both measured at 1 MHz test frequency — the SRF ceiling means this part is usable as a choke or filter element well into VHF bands, but above 200 MHz the inductive reactance collapses and the part behaves capacitively.
Package and assembly compatibility
Supplied on tape and reel, so it feeds directly into a pick-and-place machine without a reel-change interruption for prototype or production runs. Unshielded construction — the magnetic field radiates from the drum core, so adjacent traces carrying sensitive analog signals or high-impedance nodes should be kept at least one part-width away to avoid parasitic coupling.