Square D HOM280 common trip, thermal magnetic; 2 pole; 120/240 vac at 50/60 hz (ul/csa); 80 ampere; interrupting rating 10000 ampere; wire size 4 to 2/0 awg (aluminum/copper); plug on mounting; size 2.98 inch d x 3.13 inch h; approval ul; used on load center