SENTRON, cylinder fuse link, Class CC, 2 A, slow-blow, Un AC: 600 V Not for use within the European Economic Area (EEA), Turkey, Switzerland! UL fuse systems Class CC and Class J. The 3NW fuse system from Siemens as an important component of the SENTRON protection components for electrical installations offers effective protection of persons, equipment and systems by means of safe disconnection in the event of overload and short circuit. Class CC fuses are used for "Branch Circuit Protection" applications. Class J fuse links are used for "Branch Circuit Protection" and in the "Feeder Circuit". The main features of the Siemens NW fuses are: 1. facilitated export due to UL and CSA approval for typical applications in the North American market. 2. modern design with contact protection ensures safe installation. 3. possible fuse replacement of the fuse holders in de-energized condition. Siemens offers for safe, efficient.