The ABB XT5HU360BBFF000XXX is a Tmax XT5 molded case circuit breaker rated for 600 A continuous at 600 VAC, 3-pole construction. At 600 A this breaker handles main feeder or large motor-circuit duty where the load current stays under that continuous threshold — the thermal-magnetic trip unit holds steady up to the frame rating without nuisance tripping on normal inrush. Three poles cover three-phase line, so the breaker simultaneously opens all phases on a fault, which avoids single-phasing a downstream motor load.
600 A continuous rating means the breaker carries a full 600 A load without exceeding its thermal limit — sized for a main disconnect on a 600 A bus or a large motor. At 600 VAC it is rated for 600 V industrial systems; the 3-pole construction matches three-phase power distribution. The molded case design gives a compact, self-contained enclosure that mounts in a standard panel or switchboard.