Home Electrical Fuses and Accessories Fuse Accessories Fuse Blocks and Holders Power Fuse Blocks Bussmann JM60400-3CR Modular Open Style Fuse Block, 600 VAC, 300 VDC, 225 to 400 A, 3 Poles, Class: J, 4 AWG to 600 kcmil, 4 to 3/0 AWG Wire