- Schneider Electric Square D™ TeSys™ DF Fuse Holder, 690 VAC, 30 A, 1 Pole, Class: CC, Screw Clamp Connection, 16 to 10 AWG Wire, DIN Rail Mounting, 38 mm Fuse Length, 10 mm Diameter Fuse, -40 to 70 deg C, For Use With: Manual Motor Control Switch and Disconnect, 17.5 mm W x 61 mm D x 79.5 mm H Dimensions