Surge arrester Type 2, requirement class C, UC 350V, pluggable protection modules, 2-pole, 1+1 circuit for TN-S and TT systems with FRN display, compact design. Surge protection devices to protect against surges in electrical installations. The surge protection devices from Siemens, as an essential 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 requirements, Siemens offers surge protection devices for all applications and every area of use. The 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 signaling contact.