2.2 µH shielded power inductor for DC-DC rail filtering
The Murata DFE21CCN2R2MELL is a 2.2 µH drum-core wirewound inductor from the DFE21CCN_EL series, shielded to contain flux and rated for 1.8 A continuous current with a saturation current of 2.1 A. The 138 mOhm maximum DCR keeps I²R losses manageable in a 1.8 A rail — at full load the self-heating is roughly 0.45 W, which the 0805 metal-core construction dissipates into the board copper without exceeding the 125°C temperature ceiling.
Saturation headroom and temperature grade
The 2.1 A saturation current sits 16% above the 1.8 A continuous rating — this headroom means the inductance holds its value under transient load steps common in point-of-load converters, where the peak current can exceed the DC bias for tens of microseconds.
0805 footprint and reel packaging
Supplied on tape and reel (cut tape available), the shielded construction means adjacent inductors on the same reel can be placed without mutual coupling concerns during reflow.