What the ratings mean for fit
The ABB XT2NU3025EFF000XXX is a 3-pole molded-case circuit breaker on the XT2N 125 A frame, rated 25 A continuous at 480 VAC. The 65 kA interrupting capacity at 480 V means it can safely clear a bolted fault up to that level without rupturing — critical for high-fault-capacity panels where a lower-rated breaker would cascade upstream. Panel-mount construction suits it for fixed-mount distribution boards or switchgear assemblies where DIN-rail isn't the standard.