Shown here are KEMET’s family of EMI cores. Users will find that KEMET offers a wide variety of form factors. Series names are noted in the blue boxes. The ESD-R and the B-20 bead varieties come in either manganese-zinc or nickel-zinc. The ESD-SR and flat cable cores are made with nickel-zinc, while the ESD-SR-H series is made with manganese-zinc.