NXD63B120L - 1200Amp Circuit Breaker

NXD63B120L - 1200Amp Circuit Breaker

When you’re replacing a circuit breaker in existing equipment, getting the details right matters. The NXD63B120L is an NXD6 molded-case circuit breaker with a 1200-amp rating, three poles, and a non-interchangeable trip unit. It measures about 16 inches high, 9 inches wide, and 6 inches deep, so those dimensions are useful to check when matching a breaker to an existing installation. Electrical ratings include 25kA at 600VAC, 50kA at 480VAC, and 65kA at 240VAC. For applicable 2-pole DC applications, the breaker is rated 130kAIC at 250VDC. Line- and load-side lugs are included. For maintenance teams working with legacy electrical equipment, this breaker is most relevant when the application specifically calls for the NXD6 configuration and these electrical ratings. Rather than matching on amperage alone, check the complete part number, dimensions, pole configuration, voltage, interrupting rating, trip unit, and connections. The NXD63B120L is built to last and is intended to provide the required form, fit, and function when used in a compatible electrical system.

Key Features and Benefits

• 1200-amp rating for applications specifically designed around this current rating.
• Three-pole configuration for compatible three-pole electrical systems.
• NXD6 molded case design for equipment requiring this breaker type and physical configuration.
• Interrupting ratings of 25kA at 600VAC, 50kA at 480VAC, and 65kA at 240VAC.
• 130kAIC at 250VDC for applicable 2-pole applications.
• Non-interchangeable trip unit as part of the breaker configuration.
• Line- and load-side lugs included, providing the specified connection arrangement.
• Clearly defined dimensions make it easier to compare the breaker with the space and configuration of existing equipment.
• Built to last when properly matched, installed, and operated within its specified ratings.

Technical Specifications

• Part Number: NXD63B120L
  
• Type: NXD6
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 1200A
  
• Poles: 3
  
• A.I.C. Rating at 600VAC: 25kA
  
• A.I.C. Rating at 480VAC: 50kA
  
• A.I.C. Rating at 240VAC: 65kA
  
• DC Rating: 130kAIC at 250VDC for 2-pole applications
  
• Trip Unit: Non-Interchangeable
  
• Line-Side Lugs: Included
  
• Load-Side Lugs: Included
  
• Height: 16.0 in.
  
• Width: 9.0 in.
  
• Depth: 6.0 in.
  

Material Compliance and Certifications

• No specific material-compliance declarations or third-party certifications were included in the available specifications for the NXD63B120L. If a particular certification, listing, or material standard is required for the installation, confirm that requirement in the applicable product documentation before installing the breaker.

Where It Works Best

• The NXD63B120L is best suited to existing or legacy electrical distribution equipment designed for the NXD6 breaker configuration. It can be a practical replacement option when maintaining equipment where the original form, fit, and electrical function need to be preserved.
• Before using the NXD63B120L as a replacement, compare more than just the amp rating. Check the part number, three-pole configuration, physical dimensions, system voltage, A.I.C. requirements, trip-unit configuration, and lug arrangement against the existing equipment.
• In short, this breaker makes the most sense when the system calls for these specific characteristics. A careful specification match helps ensure the NXD63B120L is being used where it belongs.