Surface Mount Ferrite Beads Fair-Rite Surface Mount (SM) Ferrite Beads feature a rugged construction that lowers the DC resistance and increases current carrying capacity. The SM beads meet the solderability specifications when tested in accordance with MIL-STD-202, method 208. Fair-Rite Surface Mount Ferrite Beads are available in several materials and sizes with a recommended operating temperature of -55°C to +125°C.