The F1C2-0404 is the entry-level series in the F1C2 high-power shielded SMD family, with heights from 2.1 mm to 3.0 mm over a 4.1 × 4.1 mm footprint. Flat wire winding and a T-core iron-powder alloy element reduce AC losses compared to round wire designs, improving thermal efficiency in high-density DC-DC output filtering and VRM applications where sustained high currents are the dominant design challenge.