Mersen midget fuse blocks accommodate all 30 A 1-1/2 x 13/32 in midget fuses. Class CC fuse blocks accommodate all 30 A Class CC fuses. A choice of box, screw or pressure plate connectors fit a wide range of stranded or solid copper wire. Insulators are glass filled polycarbonate (GFPC) with verified dielectric strength in excess of 2500 V. Fuse blocks feature a unique adder block which can be snapped onto 1, 2 or 3-pole blocks to form multi-pole segmented blocks of as many poles as desired. All fuse clips are made of high conductivity tin plated copper alloy. Mersen Fuse Block, Open Style, Series: 303, 600 VAC/VDC, 30 A, 3 Pole, 3 ph, Class: Midget, Copper Box Connection, 14 to 6 AWG Wire, DIN Rail/Threaded Mounting, 1-1/2 in Fuse Length, 13/32 in Diameter Fuse, 125 °C, For Use With: ATQ, ATM, A6Y-2B, A25Z-2, TRM, OTM, A15QS-2, GFN, GGU, A60Q-2, DCT Series Fuse, Glass Reinforced Polycarbonate, 2.35 in W x 1.31 in D x 3.04 in H Dimensions