Different ferrite suppressor elements exhibit varying suppression frequency ranges. Generally, the higher the permeability, the lower the suppression frequency. Additionally, larger ferrite volumes lead to better suppression effects. Within a fixed volume, longer and slender shapes offer superior suppression compared to shorter and thicker ones, and smaller inner diameters enhance the suppression effect as well. However, under conditions of DC or AC bias currents, there is also the issue of ferrite saturation. The larger the cross-sectional area of the suppression element, the less likely it is to saturate, and it can withstand higher bias currents.

When the EMI absorption magnetic ring/magnetic bead suppresses differential mode interference, the current passing through it is proportional to its volume; the mismatch between the two causes saturation, reducing the component's performance. When suppressing common mode interference, both lines (positive and negative) of the power supply are simultaneously passed through a magnetic ring. The effective signal is the differential mode signal, and the EMI absorption magnetic ring/magnetic bead has no effect on it. However, for common mode signals, it will exhibit a larger inductance. A good method in the use of magnetic rings is to have the wire passing through the ring wind around a few times to increase the inductance. Its suppression of electromagnetic interference can be reasonably utilized based on its working principle.