Part identity and key rating
The ABB XT1HU3080AAA000XXX is a 3-pole molded case circuit breaker (MCCB) in the XT1H 125 TMF frame, part of the XT1 series. The 3-pole configuration means it simultaneously switches and protects all three phases of a three-phase power circuit — no exceptions. That pole count is fixed; this variant is not field-convertible to a different number of poles.
As a 3-pole MCCB on the XT1H 125 TMF frame, this breaker mounts into standard distribution panelboards and motor control center buckets sized for the XT1 footprint. The fixed 3-pole block occupies the full width of the frame — no shared-neutral or single-phase tap without external wiring. Verify the panel's mounting base and bus bar spacing accept the XT1H 125 frame before committing the cutout.