This is not very difficult, and if you want to know how to select a ferrite bead for a design, you just have to pay attention to a bead’s specifications How to choose a Ferrite Bead. The frequency range where the impedance curve rises varies depending on the material of the ferrite bead. Diferent ferrite bead shapes, sizes and core materials provide diferent characteristics to choose from This plot should include three lines, the overall Applying and Measuring Ferrite Beads Whitham D. Reeve and