BARRIER, STANDARD; PHENOLIC; 1 POLE; CLASS R FUSE; FUSE VOLTAGE RATING 250 V; FUSE CURRENT RATING 400 AMPERE; WIRE SIZE (2) 1/0 AWG TO 350 MCM (ALUMINUM/COPPER); BOX LUG TERMINAL; CLIP REINFORCED; APPROVAL UL 512, CSA, CE; MARATHON[R] BRAND; R400A MODEL