Square D QOB280 common trip, thermal magnetic; 2 pole; 120/240 vac at 50/60 hz; 80 ampere; interrupting rating 10 kiloampere at 120/240 vac (ul/csa); wire size 4 to 2/0 awg (aluminum/copper); bolt on mounting; size 1.5 inch w x 2.91 inch d x 3.5 inch h