ABB XT1NU3025AFF000XXX Molded Case Circuit Breaker Brand: ABB. Part Number: XT1NU3025AFF000XXX. ABB Molded Case Circuit Breaker, Low Voltage, Series: Tmax XT, 600Y/347/690 VAC, 25 A, 50/60 Hz Frequency, 18 kA Interrupt, XT1 125A Frame, Fixed Thermal/Fixed Magnetic Trip, 25 to 500 A Trip, 3 Pole, Front Line/Load Side Connection, Double Insulated Insulation, -13 to 158 deg F, 5.12 in H x 3 in W x 2.75 in D Dimensions. Additional Description: ABB -XT1NU3025AFF000XXX XT1N 125 TMF 25-500 3P F F UL/CSA. Catalog Description: XT1N 125 TMF 25-500 3p F F UL/CSA..