ND63B120L - 1200Amp Circuit Breaker

ND63B120L - 1200Amp Circuit Breaker

The ND63B120L is a Type ND6, 1200-amp, 3-pole molded case circuit breaker with an interchangeable trip unit. It measures 16" high x 9" wide x 6" deep and comes with both line- and load-side lugs. Interrupting ratings are 25kA at 600VAC, 50kA at 480VAC, and 65kA at 240VAC. For applicable 2-pole DC configurations, the specified rating is 130kAIC at 250VDC. This breaker is generally used to maintain existing electrical equipment designed around the ND6 configuration. In those situations, the details matter: frame size, amperage, number of poles, AIC rating, trip arrangement, dimensions, and connections must match the equipment requirements. For the right application, the ND63B120L gives you the form, fit, and function needed to keep compatible legacy equipment in service. It's a substantial molded case breaker built to last in the applications it was designed for.

Key Features and Benefits

• 1200A, 3-pole configuration for compatible electrical distribution equipment
• Type ND6 molded case design
• Interchangeable trip unit
• Rated 25kA at 600VAC
• Rated 50kA at 480VAC
• Rated 65kA at 240VAC
• 130kAIC at 250VDC for applicable 2-pole configurations
• Includes line-side and load-side lugs
• Measures 16" H x 9" W x 6" D
• Well suited to maintaining compatible legacy equipment where the original breaker specifications need to be matched
  

Technical Specifications

• Part Number: ND63B120L
  
• Type: ND6
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 1200A
  
• Poles: 3
  
• 600VAC AIC Rating: 25kA
  
• 480VAC AIC Rating: 50kA
  
• 240VAC AIC Rating: 65kA
  
• 250VDC Rating: 130kAIC for 2-pole applications
  
• Trip Unit: Interchangeable
  
• Lugs: Line and load side included
  
• Height: 16.0 in.
  
• Width: 9.0 in.
  
• Depth: 6.0 in.
  

Material Compliance and Certifications

• The supplied specifications for the ND63B120L didn't include specific certification and material-compliance information. If your installation requires a particular UL listing, CSA certification, RoHS status, or other compliance designation, check the breaker nameplate and applicable documentation before installation. With electrical equipment, don't assume those details from the part number alone.
  

Where It Works Best

• The ND63B120L is a good fit for existing electrical distribution equipment designed to accept a compatible Type ND6 1200A breaker. It's especially useful in maintenance and replacement situations where changing the original equipment configuration isn't the objective—you need a breaker that matches the required form, fit, and electrical function.
• Before using it as a replacement, carefully check the existing breaker and equipment requirements. Confirm the 1200A rating, three-pole configuration, operating voltage, required AIC, trip unit, physical size, mounting arrangement, and lug configuration. Part numbers matter, but they aren't the only factor that determines compatibility.