What the ratings mean for a DC-DC rail
The DFE252010P-R68M=P2: The 680 nH inductance at 3 A continuous rating with a 4.1 A saturation floor means this part handles the full load current of a 3 A buck converter without the core saturating — the Isat headroom gives margin for transient spikes during load steps. 48 mOhm max DCR at 3 A dissipates about 0.43 W — fine for the 1008 body in still air, but if the inductor sits next to a hot regulator on a tight layout, the temperature rise from self-heating plus ambient could push past the 125 °C ceiling. Keep the adjacent copper pour generous.