FA32040 Panelboard Circuit Breaker; Type Molded Case, Thermal Magnetic, Main; Voltage Rating 240 Volt AC; Current Rating 40 Amp; Number of Poles 3; Interrupting Rating 10 Kiloamp at 240 Volt AC, 25 Kiloamp at 480 Volt AC, 25 Kiloamp at 600 Volt AC; Trip Setting 400 Amp Hold, 850 Amp Trip; Installation Plug-On; Application Construction, Commercial Building, Control Equipment Panel, Industrial Building, OEM Commercial; Used On I-Line Panelboard and Switchboard; Approval UL 489, CSA, IEC, Federal Specification W-C-375B/GEN; Frame Type F; Phase Connection Type ABC; Size 4.5 Inch Width x 4.13 Inch Depth x 6 Inch Height; Mounting Height 5.5 Inch; Wire Size (1) 12 to 1/0 AWG (Aluminum) or (1) 14 to 1/0 AWG (Copper)