The PowerPact™ J-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. J-frame circuit breakers are available with either thermal-magnetic or Micrologic™ electronic trip units. The amperage ratings of the thermal trip elements are calibrated at 104°F (40°C) free air ambient temperature. Per the National Electric Code® (NEC®) and the Canadian Electrical Code, standard circuit breakers may only be applied continuously at up to 80% of their rating. This PowerPact J, unit mount circuit breaker,is a 3-pole, 150A, has a breaking capacity of 14 kA@600VAC. This breaker has a thermal-magnetic trip unit. This breaker complies to UL listed, CE, IEC, CCC & CSA standards. With a Phase connection of this unit has a magnetic hold current of 750A and a magnetic tripping current of 1500A. Dimensions for this breaker are 7.52 in(H), 4.12 in(W), 5 in(D) with an ambient temperature of 40 °C. This product comes with an 18 months warranty.