47 µH at 170 mA — the DC-DC filter or signal-line choke
The LQH32CN470K53L is a 47 µH drum-core wirewound inductor in Murata's LQH32 series, built on a ferrite core with an unshielded construction. The 15 MHz self-resonant frequency means the inductor's impedance remains inductive up to that point; above 15 MHz the parasitic capacitance dominates and the part behaves as a capacitor. For a buck converter switching at 500 kHz to 2 MHz, the 47 µH value and 15 MHz SRF leave plenty of headroom before the impedance roll-off.
1210 footprint and board-fit constraints
The unshielded construction means the external magnetic field couples into adjacent traces or components — keep a clearance of at least one part width from sensitive analog or RF traces, or plan for a shield can over the area. No moisture sensitivity level is stated, but ferrite-core wirewounds of this size typically handle MSL 1 (no bake required before reflow).