Read our brochure for better reliability and longevity of your arrester with EPCOS E Series Energy Varistors. These crucial components are active elements in gapless surge arresters for overvoltage protection of medium and high voltage AC power utility distribution systems. They are ideal for porcelain housed arresters, polymer housed arresters with a hollow insulator and molded polymer arresters. A broad range of diameters supports different class requirements according to IEC and ANSI.