Surge arrester T1/T2, UN 240/400V, UC 335/264V A.C., pluggable protection modules, 3+1 circuit (TN-S, TT), width 72mm with remote indication. Surge protection devices designed to protect against surges in electrical systems. Siemens surge protection devices, as an essential part of the SENTRON protection components for electrical installations, provide effective protection against lightning and surges caused by atmospheric influences or switching operations. Convenient mounting and connection technology, along with 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. Siemens surge protection devices are particularly characterized by: 1. Effective investment and system protection against lightning and surges. 2. The right lightning and surge protection for every application (Type 1 to 3). 3. Remote indication contact for external status monitoring.