Wieland WK 4/THSI5 U Fuse Terminal Block with screw connection for mounting on TS35/TS32 and nominal cross section 4mm². The fuse block of this type have a flip top disconnect lever. It accepts fine-wire fuses of 5 x 20, 5 x 25 and 5 x 30mm or 6.3 x 32mm. The hinged lever has latch points both in the open and in the closed state and can be sealed. Depending on the application and the installation method, the circumstances for increased temperature must be checked in the closed fuse holders. Higher ambient temperatures are an additional load for the fuse inserts, therefore the reduction of the rated current must be considered accordingly in these applications.