Surge arrester Type 2, requirement class C, UC 350V, pluggable protection modules, 4-pole, 3+1 circuit for TN-S and TT systems. Surge protection devices to protect against surges in electrical installations. Siemens surge protection devices, as an important component of the SENTRON protection devices for electrical installations, provide effective protection against lightning and surges caused by atmospheric influences or switching operations. Convenient mounting and connection technology, as well as a consistent design, are the hallmarks of this device family. Whether for infrastructure or industrial applications, Siemens offers surge protection devices for all applications and every area of use. Siemens surge protection devices are characterized primarily by: 1. Effective investment and plant protection against lightning and surges. 2. The right lightning and surge protection for every application (Type 1 to 3). 3. Remote contact for external status indication upload. 4. Reliable safety during installation thanks to standard protective measures against contact and encroachment. 5. Tool-free removal from the DIN rail. 6. Clearly visible fault indication. 7. Data matrix code on the front of the device provides quick and easy access to all information related to lightning and surge protection. 8. Optimal technology for your safety - exclusively from Siemens.