What the 50 mA rating means on the bench
The LBC2518T471MV is a wirewound inductor rated for 50 mA continuous current. The 470 µH inductance is tested at 796 kHz, and the self-resonant frequency sits at 3.5 MHz. Above that frequency the inductor behaves capacitively, so it is best suited for filtering or energy storage in DC-DC converters switching below 1 MHz.
NRND — what it means for your BOM
That means it is still available for existing production but no longer the first choice for a new board spin.
Package and footprint fit
It is unshielded, so keep it away from sensitive analog traces or other magnetics that might couple noise. The Tape & Reel packaging suits automated pick-and-place.