What this part is and what it does
The ABB XT2VU3090BFF000XXX is a molded-case circuit breaker (MCCB) from the XT2V series, fitted with a TMA (thermal-magnetic adjustable) trip unit rated for 125 A frame size. It provides overcurrent and short-circuit protection in distribution panels and motor control centers, with the TMA trip allowing field adjustment of the thermal pickup and magnetic threshold to coordinate with downstream loads.
