circuit breaker 3VA6 UL Frame 400 breaking capacity class M 35 kA @ 480 V 4-pole, line protection ETU550, LSI, In=250 A overload protection, 100% rated Ir=100 A...250 A short-circuit protection Isd=0.6..10x In, Ii=1.5..12x In neutral conductor protection adjustable (OFF, up to 160%) without connection