EMI Suppression Ferrite Chip Beads Pulse Electronics EMI Suppression Ferrite Chip Beads utilize unique materials that enable optimized performance from 25MHz to >,1GHz and have sizes that range from 0402 to 4532. These ferrite chip beads are available for low- and high-frequency situations and come in commercial and automotive grades. Pulse Electronics EMI Suppression Ferrite Chip Beads offer an impedance range from 10Ω to 2200Ω, a 6A maximum DC current rating, and are available with SMD/SMT or solder termination styles.