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Hydraulic/Magnetic Circuit Breaker - 3 Pole - 50A - 480VAC/277VAC - Handle (One Per Pole) - Series Trip (Current) - S.P.D.T. - 0.110 Q.C. Term. - 50/60Hz Medium Delay - Stud 10-32 - Dual Legend - Black Actuator - 6-32 x 0.195 Inches Threaded Insert - UL R