What this 80 A MCCB means for your panel
The ABB XT1NU3080AAA000XXX is a 3-pole molded case circuit breaker rated at 80 A continuous, housed in the Tmax XT1 frame rated to 125 A. The 80 A thermal-magnetic trip unit is fixed — no interchangeable trip blocks — so the breaker arrives set for that ampacity and stays there. On a 600 VAC line, that 80 A rating governs the feeder or branch circuit it protects; the 125 A frame gives headroom for high-fault clearing without nuisance tripping on inrush. The 3-pole fixed configuration with front flat terminals suits standard panelboard or switchboard mounting. The Tmax XT1 family is a compact MCCB line — the frame size keeps panel fill factor manageable for 80 A protection in a 125 A envelope.
Volume procurement inquiries welcome — the part is not on allocation or restricted.