A novel nonlinear behavioral model is proposed for an amorphous-core inductor working up to magnetic saturation. The model relies only on electrical quantities and represents the component as the series connection of a nonlinear conservative inductor and a nonlinear resistor, which accounts for the instantaneous losses in both the windings and the core. The model is identified and validated through measurements collected on a simple circuit, with applied unbiased sinusoidal voltage at two different frequencies.