NXD63B900 - 900Amp Circuit Breaker

NXD63B900 - 900Amp Circuit Breaker

When you're replacing a breaker in existing equipment, getting the details right matters. The NXD63B900 is an NXD6 molded-case circuit breaker rated at 900 amps, with a 3-pole configuration and a non-interchangeable trip unit. It includes load-side lugs and measures approximately 16" high × 9" wide × 6" deep, so that you can compare both the electrical ratings and physical size with the breaker already in your system. Interrupting ratings are 25 kA at 600VAC, 50 kA at 480VAC, and 65 kA at 240VAC. For applicable 2-pole DC applications, the breaker is also rated 30 kAIC at 250VDC. The NXD63B900 makes the most sense in existing or legacy equipment specifically designed around these characteristics. Rather than choosing by amperage alone, check the type, poles, voltage, A.I.C. rating, dimensions, and connection requirements against your application. When those specifications line up, this is a straightforward form, fit, and functional replacement option that's built to last when properly applied and maintained.

Key Features and Benefits

• 900A rating for systems requiring this specific current capacity.
• 3-pole configuration for compatible three-phase applications.
• NXD6 type helps identify the correct configuration for existing equipment.
• Interrupting ratings of 25 kA at 600VAC, 50 kA at 480VAC, and 65 kA at 240VAC.
• 30 kAIC at 250VDC for applicable 2-pole applications.
• Non-interchangeable trip unit as part of the breaker design.
• Load-side lugs included for the appropriate connection.
• Approximate dimensions of 16" H × 9" W × 6" D make it easier to check physical fit before installation.
• Designed for continued use in compatible equipment when properly selected, installed, and maintained.

Technical Specifications

• Part Number: NXD63B900
  
• Type: NXD6
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 900A
  
• Poles: 3
  
• A.I.C. @ 600VAC: 25 kA
  
• A.I.C. @ 480VAC: 50 kA
  
• A.I.C. @ 240VAC: 65 kA
  
• DC Rating: 30 kAIC 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

• Specific certification and material compliance information was not provided with the available product specifications. Because these requirements can depend on the equipment and application, check the markings on the individual breaker and the appropriate technical documentation when a particular listing or certification is required.
• Do not assume UL, CSA, RoHS, or other compliance status unless you confirm it for the specific unit.

Where It Works Best

• The NXD63B900 is primarily suited to existing and legacy electrical systems that require an NXD6 molded case circuit breaker with a 900A rating and 3-pole configuration. You may use it in compatible commercial or industrial electrical distribution equipment where its dimensions, connections, voltage ratings, and interrupting capacities match the original equipment requirements.
• Here's the important part: 900 amps alone doesn't determine compatibility. A replacement breaker must also match the requirements for type, poles, voltage, interrupting rating, physical fit, trip configuration, and connections. Checking those details beforehand can help avoid selecting a breaker that doesn't belong in the application.
• For that reason, compare the NXD63B900 specifications with the existing breaker and equipment documentation before installation. Qualified electrical personnel should verify compatibility and installation, and handle the work in accordance with applicable electrical codes and equipment requirements.