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BSiemens ND Series circuit breakers reduce the risk of fault currents and fatal electrical shocks. These units feature a non-interchangeable trip for long time and instantaneous (LI) functionalities providing maximum current limiting protection. They have load side lug terminals for ease of installation and secure wiring. These ND frame units deliver 50kAIC at 480V and are suitable for reverse feed applications. These ND Series trip units are available in current ratings in the range of 900A - 1200A on Raptor Supplies.