4.7 µH at 450 mA — where this core sits in the power rail
The LQH32CN4R7M23L is a 4.7 µH drum-core wirewound inductor from Murata's LQH32 series, rated for 450 mA continuous current with a max DCR of 260 mOhm.
Self-resonant frequency and the real filtering bandwidth
The self-resonant frequency is 43 MHz, measured at 1 MHz test frequency. Below about 10 MHz the part behaves as a pure inductor; above that the inter-winding capacitance starts to dominate and the impedance rolls off. For a buck converter switching at 2-3 MHz this is well within the inductive region, but if you're using it as a high-frequency choke above 20 MHz the effective inductance drops fast.
Unshielded trade-off and board placement
Being unshielded, the LQH32CN4R7M23L radiates a stray field that can induce noise in nearby loops. On a dense board with a mixed-signal section, a shielded alternative in the same footprint would contain the flux.