PowerPacTM-Frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits. PowerPacT M-Frame circuit breakers have either a fixed long time electronic trip unit or an adjustable amperage version. This circuit breaker has an electronic trip unit, ET 1.0. All PowerPacT circuit breakers have an integral push-to-trip button in the cover to manually trip the circuit breaker. PowerPacT M circuit breakers are available in 2 and 3-pole unit mount or I-Line construction. This unit has a busbar connection. This PowerPacT M, 400A, 3 pole, circuit breaker has an interrupting rating of 25kA at 600VAC. This circuit breaker has a continuous current rating of 80%. PowerPacT M circuit breakers comply to UL, CSA, NOM, and IEC standards and are CE marked.