ND63B900 - 900Amp Circuit Breaker

ND63B900 - 900Amp Circuit Breaker

When you're maintaining an electrical distribution system that's been in service for years, finding the right replacement breaker isn't always as simple as matching the amperage. The breaker has to fit the existing equipment, meet the electrical requirements, and provide the protection the system was designed around. Get one of those details wrong, and what should be a straightforward replacement can turn into a much bigger job.

Then there's the trip unit. Unlike a breaker with a permanently fixed trip assembly, the ND63B900 features an interchangeable trip unit. This is an important identification point when matching the breaker to an existing installation. The actual trip unit model, settings, and protective characteristics still need to be confirmed, since interchangeable doesn't mean every trip unit will be suitable for every application.

Key Features and Benefits

• 900 Amp Current Rating
• 3-Pole Circuit Breaker Configuration
• Type ND6 Identification
• Molded Case Circuit Breaker Design
• Interchangeable Trip Unit
• Two-Pole DC Application Rating
• Included Load-Side Lugs
• Existing Equipment Compatibility Checks
• Form, Fit, and Function Replacement

Technical Specifications

• Part Number: ND63B900
  
• Product Category: Circuit Breaker
  
• Breaker Type: ND6
  
• Breaker Construction: Molded Case Circuit Breaker
  
• Rated Current: 900 Amps
  
• Number of Poles: 3
  
• Trip Unit Configuration: Interchangeable Trip Unit
  
• AC Interrupting Rating at 600VAC: 25kA (25,000 Amps)
  
• AC Interrupting Rating at 480VAC: 50kA (50,000 Amps)
  
• AC Interrupting Rating at 240VAC: 65kA (65,000 Amps)
  
• DC Interrupting Rating: 30kA (30,000 Amps) at 250VDC
  
• DC Application Configuration: Two-Pole Applications
  
• Included Connections: Load-Side Lugs
  
• Height: 16.0 inches
  
• Width: 9.0 inches
  
• Depth: 6.0 inches
  
• Overall Dimensions (H × W × D): 16.0" × 9.0" × 6.0"
  
• Approximate Shipping Weight: 75.00 lbs.
  

Material Compliance and Certifications

A circuit breaker can have the right amperage and still be unsuitable for a particular installation. That's why electrical ratings, mechanical compatibility, and the complete breaker configuration all need to be considered before replacement.

The available product information does not identify the specific materials used in the breaker housing, contacts, terminals, or internal assemblies. It also does not independently establish a UL listing, CSA certification, or other product-specific certification. Any required approvals should be confirmed through the manufacturer's documentation and the markings on the actual breaker.

Where It Works Best

• Compatible Type ND6 Installations
• Existing Electrical Distribution Equipment
• Commercial Electrical Facilities
• Industrial Electrical Systems
• Manufacturing Plant Maintenance
• Facility Electrical Maintenance
• Legacy Circuit Breaker Replacement
• Three-Pole AC Circuit Protection
• 900 Amp Circuit Applications