3.3 µH, 1.15 A — DC-DC filter fit
The LQH3NPZ3R3MMEL is a 3.3 µH shielded wirewound inductor rated for 1.15 A continuous with a maximum DC resistance of 100.8 mOhm. These three numbers — inductance, current, and DCR — define its role in a buck converter's output filter or a point-of-load input stage: the inductance sets the ripple current, the current rating must exceed the peak inductor current with margin, and the DCR contributes to the I²R conduction loss that drives the temperature rise. The saturation current is 1.52 A, providing about 32 % headroom above the rated current before the inductance begins to roll off. This margin is typical for a power inductor designed to handle transient load steps without saturating the ferrite core.
1212 (3030 Metric) footprint
The shielded construction contains the magnetic flux within the core, reducing radiated EMI into adjacent traces or components — relevant when the inductor sits near a sensitive analog or RF section on the same board. The self-resonant frequency is 55 MHz, well above the typical 1–4 MHz switching frequency of a DC-DC converter using a 3.3 µH inductor, so the inductor behaves as a pure inductive element in the switching band.