Active AEC-Q200 power inductor for automotive DC-DC input filtering
The Murata LQH3NPZ100MJRL is an active-production shielded wirewound inductor in the LQH3 series, rated 10 µH ±20% with a continuous current of 1.2 A. The 288 mOhm max DCR produces roughly 0.41 W of I²R loss at full rated current — that heat must be managed within the 3.00 mm × 3.00 mm 1212 footprint, so the board copper area under the part matters for thermal performance.
Shielded construction and saturation margin for switching regulator inputs
The ferrite core and shielded winding reduce radiated EMI compared to an unshielded drum core — useful when the inductor sits near a wireless receiver or a sensitive analog front-end. Saturation current is specified at 810 mA, meaning the inductance drops by 30 % at that DC bias; the 1.2 A rated current is thermally limited, so the part will saturate before it overheats if the DC bias exceeds 810 mA. Self-resonant frequency is 30 MHz, well above the typical 1–2 MHz switching frequency of a modern automotive buck converter, so parasitic self-resonance does not affect the filter response.