The V20 surge arrester made of halogen-free plastic is suitable for surge protection potential equalization according to VDE 0100-443 (IEC 60364-4-44). A dynamic disconnection device and optical status indicator characterize the modular plug-in arresters. The NPE variant is additionally equipped with a high-capacity spark gap between the neutral and protective conductors. The SurgeController is particularly suitable for potential equalization in main and sub-distributions, depending on the type, in TN and TT network areas. Thanks to the high-performance varistors, the discharge capacity is up to 40 kA (8/20) per pole. The vibration-resistant locking mechanism and the voltage as well as type coding ensure safety and prevent confusion between upper and lower parts. The wedge-shaped design of the contacts allows for easy insertion and even easier removal of the upper parts.