100 µH shielded drum core — where the saturation current governs the DC bias point
The Coilcraft LPS6225-104MRC is a 100 µH shielded drum core inductor in the 2424 (6060 Metric) SMD package, part of the LPS6225 series. The drum core construction wraps the winding around a ferrite bobbin, packing the inductance into a 6.00 mm square footprint while the ferrite sleeve contains the magnetic flux — radiated EMI stays off adjacent traces and components. Rated at 640 mA with a saturation current of 480 mA, the usable DC bias is limited by the core, not the winding temperature. The 610 mOhm max DCR produces 250 mW of I²R loss at the rated current — the shielded package dissipates that into the board copper without exceeding the 85°C ambient ceiling.
The self-resonant frequency is 7.7 MHz, so the inductor behaves as a pure inductance well below that point; above it the parasitic capacitance dominates and the impedance rolls off. Inductance is tested at 100 kHz.