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ABB XT4NU3250AFF000XXX - Molded Case Circuit Breaker 250A 600V

ABB
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ABB XT4NU3250AFF000XXX is a molded case circuit breaker from the SACE Tmax XT family, designed for thermal-magnetic protection with LI (Long-Time and Instantaneous) functions in low voltage power distribution systems. This 3-pole, 3-phase unit is rated for 250A at 600VAC, with an interrupting capacity of 25kA at 480VAC and 18kA at 600VAC, and features a bolt-on connection for secure panel mounting. Weighing 4 lb, it utilizes double insulated construction and an electronic trip unit adjustable from 250 to 2500A, operating reliably within a temperature range of -13 to 158°F. The breaker complies with UL and CSA standards and holds corresponding certifications, ensuring robust performance in industrial environments. Typical applications include motor control centers, distribution panels, and switchboards requiring reliable overcurrent protection.

Key Features & Specifications
  • Manufacturer: ABB
  • Family: SACE Tmax XT
  • Type: XT4NU
  • Item Subcategory: Molded Case
  • Functions: LI - Long-Time and Instantaneous
  • Protection: Thermal Magnetic
  • Current Rating: 250 A
  • Voltage Rating: 600/690 VAC
  • Number of Poles: 3
  • Phase: 3
  • Interrupt Rating: 25 kA at 480V, 18 kA at 600V
  • Frame Size: XT4 250A
  • Trip Unit: Electronic, adjustable 250-2500 A
  • Connection: Bolt-On
  • Mounting Type: Panel mount, front line/load side connection
  • Frequency: 50/60 Hz
  • Insulation: Double insulated
  • Operating Temperature: -13 to 158 °F
  • Weight: 4 lb
  • Standards: UL, CSA
  • Certification: UL, CSA
  • Country of Origin: United States