Switch disconnector with fuse 3KF SITOR, 630 A, Size 5, 3-pole, for LV HRC fuse Sz. 2 and 3 for semiconductor protection, front operating mechanism, central, basic unit without handle, flat terminal without fuses SENTRON 3KF switch disconnectors with fuses are optimized for complex applications in which LV HRC fuses are used. End-to-end safety for users and systems.