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Manuals for UL 489 Rated Molded Case Circuit Breakers (MCCB)
Molded case circuit breakers provide branch or feeder circuit protection against overload or short circuits, employing thermal magnetic trip units sensing both temperature and current to operate the breaker. Available in a variety of frame sizes for 3-pole configurations, UL489-rated MCCB components are available with amperage capacities up to 800A.