680 nH shielded power inductor for automotive DC-DC stages
The Murata DFE2HCAHR68MJ0L is a 680 nH shielded wirewound inductor from the DFE2H series, built on a metal composite core. It carries a continuous current rating of 3.6 A and a saturation current of 4.4 A, with a maximum DCR of 31 mOhm. The 3.6 A rated current is the DC bias at which the temperature rise stays within the design limit; the 4.4 A saturation current (Isat) is where the inductance drops by 30% — the usable current in a buck converter's output choke is the lower of the two, so the 3.6 A rating governs the load budget.
Automotive-grade qualification and temperature envelope
AEC-Q200 qualified, this inductor meets the passive-component stress and reliability tests required for automotive electronics — the qualification covers thermal shock, vibration, mechanical shock, solderability, and moisture resistance per the AEC-Q200 rev D standard. The operating temperature range spans -40°C to +150°C, covering under-hood and engine-bay ambient conditions with margin. The 150°C upper limit matches the hot-spot temperature of a power inductor running near its rated current in a 105°C ambient under-hood environment.
1008 footprint and board-fit parameters
The shielded metal-composite construction contains the magnetic field within the core — adjacent traces on a dense layout see minimal fringing flux, which simplifies EMI management in a multi-phase converter. Surface-mount termination compatible with standard reflow profiles. The tape-and-reel packaging (also available in cut tape) supports high-volume pick-and-place assembly. The 31 mOhm max DCR keeps I²R conduction losses low at 3.6 A — roughly 0.4 W self-heating at full rated current, which the 150°C temperature rating absorbs without derating.