The ABB XT5NU360BBYN000XXX is a NEXT5N 600 TMA 600-6000 3P FF UL molded case circuit breaker. The TMA designation means it carries a thermal-magnetic trip unit with adjustable thermal and magnetic settings, covering the 600 to 6000 A range in a three-pole, fixed-front (FF) UL-listed frame.
The NEXT5N 600 frame is a panel-mount molded case breaker. The fixed-front (FF) variant means the trip unit is not field-accessible without removing the cover.
