3.3 µH shielded power inductor for automotive and industrial DC-DC
The Murata DFE252012PD-3R3M=P2 is a 3.3 µH shielded wirewound inductor in the DFE252012PD series, built on a metal drum core with a 1008 (2520 metric) footprint. It carries a continuous current rating of 1.7 A and a saturation current of 2.1 A, with a maximum DC resistance of 140 mOhm.
Current rating and saturation headroom for DC-DC sizing
The 1.7 A rated current is the DC current at which the temperature rise from self-heating stays within the part's design limit. The 2.1 A saturation current (Isat) is the peak where inductance typically drops 30% — a buck converter's inductor ripple current plus DC bias should stay below this to avoid hard saturation and the resulting current spike through the switch FET. With 140 mOhm DCR, the I²R loss at 1.7 A is about 0.4 W — the metal core and shielded construction help conduct this heat into the PCB copper rather than trapping it in the winding. Inductance is tested at 1 MHz, which is typical for the switching frequencies in the 1-3 MHz range where this inductor is commonly used.
Active production with automotive-grade documentation
No known pin-compatible second-source — the DFE252012PD series footprint is proprietary to Murata's metal-alloy core process.