PowerPacT M-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 the adjustable amperage option, allowing trip setting changes between 300A to 800A using a selector switch. 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 I-Line terminations on the line side and mechanical lugs on the load side. This PowerPacT M, 300A to 800A, 3 pole, circuit breaker has an interrupting rating of 18kA at 600VAC. This circuit breaker has a continuous current rating of 80% with an ABC phase connection. PowerPacT M circuit breakers comply to UL, CSA, NOM, and IEC standards and are CE marked. Prop 65: WARNING: This product can expose you to chemicals including: DINP, which is known to the State of California to cause cancer, and DIDP, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov - Compatible Products: S29450; S29452; S32631; MPRPAF