2 Pole, 30 Amp, Thermal Magnetic, 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 on's 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, 100 Ampere At 40 Deg C, Interrupting Rating 22,000 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[R] Brand, BAB BA, QBHW Model. Product specifications Type Quicklag industrial thermal-magnetic circuit breaker Amperage Rating 30 A Voltage rating 120/240 V Trip Type Non-Interchangeable Circuit breaker type QBHW Mounting Method Bolt-on Interrupt rating 22 kAIC Number of poles Two-pole Quantity 7