Inductor for power rails: 1 µH, 3.2 A, shielded
The Murata DFE252012P-1R0M=P2 is a shielded drum-core wirewound inductor in the DFE252012P series, rated 1 µH ±20% with a continuous current of 3.2 A and a saturation current of 4.3 A. The 42 mOhm max DCR keeps conduction losses low in DC-DC converter output filters and power-supply input stages. Shielding contains the magnetic field, reducing radiated EMI to adjacent traces and components on a densely populated board.
Where it fits on the board
The iron powder core material supports the 4.3 A saturation current without the hard saturation characteristic of ferrite cores, giving a softer roll-off in inductance under overload.
Temperature range and reliability
The flat-wire winding construction (noted in the features) reduces DC resistance compared to round wire of the same cross-section, improving efficiency at high current.