Mersen Ferraz Shawmut Fuse Block, Open Style, Series: 303, 600 VAC/VDC, 30 A, 3 Pole, 3 Phase, Class: CC, Copper Box, 14 to 6 AWG Wire, DIN Rail/Threaded Mount, 1-1/2 in Fuse Length, 13/32 in Fuse Dia, 125 deg C, For Use With: ATDR, ATMR and ATQR Series Fuse, Glass Reinforced Polycarbonate, 3.04 in H x 2.35 in W x 1.31 in D