SENTRON, fuse switch disconnector 3NP1, 4-pole, NH000, 160 A, for assembly and installation on mounting plate, box terminal, cover level 45 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.