The ABB XT1NU3070AAA000XXX is a molded case circuit breaker from the XT1N 125 series, fitted with a TMF (thermal-magnetic fixed) trip unit. The 125 A frame size tells you the maximum continuous current the breaker can carry without tripping under normal load — sized for branch-circuit protection in distribution panels or motor control centers.
Mounts on a DIN rail or direct panel-mount via the XT1N 125 molded case platform. The TMF trip unit is fixed — you don't swap interchangeable trip modules on this variant, so make sure the continuous current and short-circuit settings match your load before you torque the lugs down. Out here in the grease, that means one less thing to shake loose on a vibrating conveyor line.