Power-stage inductor for automotive DC-DC converters
The Murata DFEG12060D-2R2M=P3 is a 2.2 µH shielded power inductor from the DFEG12060D series, built for high-current POL and buck converter outputs in automotive electronics. The iron powder core and low 4.4 mOhm max DCR keep conduction losses under control at 16 A continuous current, while the 21 A saturation rating (Isat) gives headroom for transient load steps without a hard roll-off in inductance.
Parametric fit and board-level decision
The 2.2 µH inductance at 100 kHz test frequency combined with 16 A current rating and 21 A saturation makes this part suited for multi-phase CPU core rails or infotainment DC-DC stages that draw 12-15 A steady-state with 20 A peaks. The iron powder core handles the DC bias without saturating early — a key advantage over ferrite when the inductor sees a high DC bias current. The shielded construction contains the magnetic field, reducing EMI coupling to adjacent traces and components — critical when the inductor sits near a wireless receiver or a sensitive analog front-end.
Obsolete status and sourcing reality
Murata has marked the DFEG12060D-2R2M=P3 as obsolete. Each lot sourced through this channel is verified for date-code consistency and marking integrity — the laser etch on the part body is cross-checked against Murata's known plant and date-code format for that production period. AEC-Q200 parts carry a traceable lot code; the reel label and packaging are inspected for tampering or rework before the lot is released to the BOM.