The ABB XT5SU360BBFF000XXX is a molded case circuit breaker from the XT5S family, fitted with a TMA 600-6000 trip unit — a thermal-magnetic adjustable type that lets you set the continuous current anywhere from 600 A to 6000 A, covering a wide range of feeder and main breaker applications. The 3-pole FF UL designation means it carries UL listing for the North American market, so it's accepted in panels built to NEC and CEC without additional agency review. The TMA trip gives you both thermal protection for overloads (inverse-time) and magnetic protection for short-circuits (fixed instantaneous), with the thermal pickup adjustable via a dial on the front face — useful when you need to coordinate downstream breakers or accommodate load growth without swapping the frame.
The TMA trip unit's adjustable continuous current range (600–6000 A) means the same frame can serve multiple ampacities, reducing the number of unique SKUs in the storeroom. The FF UL suffix confirms the breaker is fully rated for UL 489 applications, so it can be used as a service-disconnect or branch-circuit protective device without additional fusing.