Inductance, current, and DCR — the three numbers that size the rail
The DFE322512F-2R2M=P2 is a 2.2 µH shielded wirewound inductor from Murata's DFE322512F series, built on a metal-alloy core in a 1210 (3225 metric) footprint. Rated 2.6 A continuous with a saturation current floor of 3.4 A at 25°C, the part delivers a 30 % headroom above the rated current before inductance rolls off — a margin that matters when the downstream switcher hits a transient load step. DC resistance is 66 mOhm max. At 2.6 A the I²R loss is roughly 0.45 W — within the thermal budget of the 1210 body at 125°C ambient, but the board copper under the pad sets the actual temperature rise. The metal-core construction keeps core losses lower than ferrite at switching frequencies above 500 kHz, which is where this part is typically used in POL converters and point-of-load filters.
The metallization pattern is a standard two-terminal chip — the pad layout matches the generic 1210 footprint, but the metal core means the part has no polarity and no exposed ferrite edge that could crack under board flex. Tape-and-reel or cut-tape options cover proto and production volumes. The metal core and shielded construction make it suitable for dense layouts where magnetic coupling to adjacent inductors or traces must be minimised.
Sourcing and lifecycle posture
Available through independent distribution channels. The tape-and-reel packaging (standard 7-inch reel) suits automated pick-and-place lines without a reel-size change.