SENTRON, Fuse switch disconnector 3NP1, 3-pole, NH3, 630 A, for Rittal busbar system 60 mm, flat terminal, Cover level 32/70 mm Fuse switch disconnector SENTRON 3NP1 3NP fuse switch disconnector up to 630 A with enhanced protection for personnel and plants and user-friendly connection system.. Optimized technology for your safety - only from Siemens.