Plug On Mounting Frame Type: QO Dimensions: 2.25 Inch Wide x 3 Inch High x 2.91 Inch Deep Weight: 1lbs. Wire Size: 12 To 4 AWG (Aluminum), 14 To 6 AWG (Copper) QO, 40A, 240V AC, 2 Pole Interrupting Rating at 240 Volts AC: 10,000 Common Trip, with 120 Volt AC Shunt Trip