3 Pole, 20A, Thermal Magnetic circuit breaker, Miniature bolt on breaker are mainly used in commercial to light industrial application. These breakers guarantee direct power feed and energy efficient. Cost is double that of plug in breakers, but bolt ons last much longer and exceed the power factor demand of plug ins. If your using a welder, then bolt on breakers are a must. 120/240 VAC, Interrupting Rating 10000 Ampere At 120/240 VAC, 5000 Ampere At 24 To 48/62.5/80 VDC, Extended Tang Line Terminal, Box Lug Load Terminal Terminal, Wire Size 8 To 1/0 AWG (Aluminum/Copper, Load), Bolt On Mounting, Approval UL 489, HACR approve for air conditioning, heating and refrigeration applications, CSA, Quicklag Brand, BAB BA, QBHW Model. Product Specifications Current Rating 20 A Interrupt Rating 10 kA@400VAC Number of Poles 3 Series BAB Series Type Thermal/Magnetic Voltage Rating 240 V