NXD63B100 - 1000Amp Circuit Breaker

NXD63B100 - 1000Amp Circuit Breaker

When you're replacing a circuit breaker in existing equipment, the details matter. The NXD63B100 is an NXD6 molded-case circuit breaker rated at 1000 amps, with a 3-pole configuration and a non-interchangeable trip unit. It also comes with load-side lugs. Its interrupting ratings are 25 kA at 600 VAC, 50 kA at 480 VAC, and 65 kA at 240 VAC. For 2-pole DC applications, the breaker has a 30 kA rating at 250 VDC. Physically, the NXD63B100 measures approximately 16 inches high, 9 inches wide, and 6 inches deep. Those dimensions are worth checking closely, especially when using the breaker as a form, fit, and functional replacement in legacy electrical equipment. Rather than guessing based on amperage alone, compare the full specifications with the breaker being replaced and the equipment's requirements. When properly matched to the application, installed correctly, and maintained as required, these breakers are built to last.

Key Features and Benefits

• 1000A rating for compatible electrical distribution applications.
• 3-pole configuration for equipment requiring this pole arrangement.
• NXD6 molded case design for applications that call for this specific breaker type.
• Interrupting ratings of 25kA at 600VAC, 50kA at 480VAC, and 65kA at 240VAC.
• 30kA at 250VDC rating when used in applicable 2-pole configurations.
• Non-interchangeable trip unit as part of the specified breaker configuration.
• Load-side lugs included.
• Measures approximately 16" H x 9" W x 6" D, making it easier to compare the physical footprint with existing equipment.
• A practical choice for maintaining compatible legacy electrical systems where matching original specifications matters.

Technical Specifications

• Part Number: NXD63B100
  
• Product Type: Molded Case Circuit Breaker
  
• Type: NXD6
  
• Amperage: 1000A
  
• Poles: 3
  
• A.I.C. Rating – 600VAC: 25kA
  
• A.I.C. Rating – 480VAC: 50kA
  
• A.I.C. Rating – 240VAC: 65kA
  
• DC Rating: 30kA at 250VDC for 2-pole applications
  
• Trip Unit: Non-Interchangeable
  
• Load-Side Lugs: Included
  
• Height: 16.0 in.
  
• Width: 9.0 in.
  
• Depth: 6.0 in.
  

Material Compliance and Certifications

• The available specifications for the NXD63B100 did not include specific certification, listing, or material-compliance information. If your facility or project requires particular certifications or compliance documentation, check the markings on the breaker and the applicable product documentation before installation. Requirements vary by equipment and application.

Where It Works Best

• The NXD63B100 circuit breaker makes the most sense in existing electrical equipment that requires the NXD6 type, 1000A rating, 3-pole arrangement, and corresponding physical configuration. It can be especially useful for maintenance and replacement work involving legacy electrical distribution systems where keeping the correct form, fit, and function is the priority.
• Before using an NXD63B100 as a replacement, take a minute to check more than the part number. Compare the amperage, poles, voltage, A.I.C. rating, dimensions, trip-unit configuration, and lug requirements with the existing breaker and equipment documentation. Available fault current must also fall within the applicable interrupting rating.
• That careful match is important with legacy equipment. The goal is straightforward: use the breaker that fits the equipment and meets the application's electrical requirements. Qualified electrical personnel should complete the final selection and installation in accordance with applicable codes and equipment requirements.