SENTRON, cylinder fuse link, Class CC, 8 A, slow-blow, Un AC: 600 V, observe national installation regulations! Protection of control transformers, chokes, inductors 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 personal, device and system protection through safe disconnection in case 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. easier 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 holder in a de-energised state.