Power inductor for automotive and industrial DC-DC
The Murata DFE32CAH1R5MR0L is a wirewound shielded inductor in the DFE32CAH_R0 series, delivering 1.5 µH ±20% inductance with a 3.5 A continuous current rating and a 4.8 A saturation floor. AEC-Q200 qualification means this part is screened for automotive-grade thermal shock, vibration, and humidity — it belongs in engine-bay power supplies, ADAS sensor rails, or any 150°C ambient environment where a commodity inductor would drift or open.
The 3.5 A rated current is the DC bias at which the temperature rise stays within the part's self-heating limit; the 4.8 A saturation current (Isat) is the point where inductance drops by 30% typically — so a 5 A load spike will saturate the core and the inductor behaves like a short until the current falls back. 30 mOhm max DCR at 25°C sets the I²R conduction loss: at 3.5 A the copper loss is 0.37 W, which drives the self-heating. In a 105°C ambient the part's 150°C absolute limit leaves about 45°C headroom for that loss — tight but workable if the PCB copper pours under the 1210 pad sink the heat. Metal composite core gives the flat saturation curve typical of these materials — inductance rolls off gradually rather than collapsing abruptly, which matters for a buck converter that must stay in regulation during a transient.
Package and board-fit for the 1210 footprint
Shielded construction contains the magnetic field within the package — adjacent traces carrying sensitive analog signals or high-impedance nodes won't couple noise from the inductor's AC ripple field.
No official pin-compatible second-source or successor is recorded — the DFE32CAH_R0 series is the current generation. If a dual-source hedge is needed, a parametric search on 1.5 µH ±20%, 1210 shielded, ≥3.5 A rated, AEC-Q200 will turn up alternatives from other manufacturers for a BOM risk review.