E Series Multilayer Varistors EPCOS / TDK E Series Multilayer Varistors feature high energy absorption capability, low leakage current, high-temperature versions, and stable protection level. These varistors offer bidirectional clamping and no temperature derating up to 125°C. These devices are designed for transient overvoltage protection in automotive applications. EPCOS / TDK E Series Multilayer Varistors are ideal for use in engine management, airbags, control units, electrohydraulic brakes, ABS/ESP, sunroofs, load dump-protection, and jump-start protection.