Switch disconnector with fuse 3KF SITOR, 63 A, Size 1, 3-pole, for LV HRC fuse Sz. 000 for semiconductor protection Front operating mechanism left, basic unit without handle, box 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.