High-Speed Multilayer Ferrite SMD - WE-CBF HF Series. Excellent anti-EMI properties and low DC resistance Effective suppression range due internal layout In comparison to the WE-CBF series, the WE-CBF HF Series has a three times greater impedance at 1GHz Particularly suited to the suppression of signal lines in the high frequency range. Applications:. Fast data lines: CPU, highspeed bus systems, HDD