26x EMI Suppression Cores Fair-Rite 26x EMI Suppression Cores are available in flat ribbon, round cable, toroidal, and ferrite bead suppression cores variants. The Ferrite beads are cost-effective and can suppress conducted EMI signals. These chip beads can be used in devices such as cellular phones, computers, laptops, and pagers. The Ferrite round cable and flat ribbon cores are intended for larger suppression parts.