What the ratings mean for the circuit
The LQH31MN1R8K03L: The 60 MHz self-resonant frequency (SRF) means the inductor behaves inductively up to roughly 60 MHz — above that, parasitic capacitance dominates and the impedance rolls off. For a 1.8 µH part, this SRF is typical and supports filtering up to the low VHF band. Q factor of 35 at 10 MHz indicates moderate selectivity — useful for tuned circuits or impedance matching where some loss is acceptable, but not a high-Q tank for narrowband RF filters.
Board-fit and sourcing
The 1206 SMD package is a rework-friendly footprint — standard tweezers and a soldering iron handle it on site without hot air. No polarity marking needed; orientation is non-polar. Marked with base product number LQH31MN, the part is unshielded — keep it away from sensitive analog traces or place it 2-3 mm from adjacent magnetic components to avoid coupling.