KEKO Varicon is now Bourns KEKO-Varicon is a leading manufacturer of overvoltage protection products that include varistor and EMI suppression products. Bourns KEKO-Varicon Circuit Protection product offering includes overvoltage protective and EMI suppression components. All KEKO-Varicon products have been fully integrated into the Bourns corporate structure. Bourns KEKO-Varicon Circuit Protection products can be designed into a broad variety of low voltage board level (LVBL), telecommunication, automotive electronics, AC-line, transient voltage surge suppression (TVSS), medical, and high-energy industrial equipment applications.