NM632450 - 450Amp Circuit Breaker

NM632450 - 450Amp Circuit Breaker

The NM632450 is a 450-amp, 3-pole Type NM molded-case circuit breaker for compatible electrical equipment, with a molded-case, bolt-on mounting configuration, thermal-magnetic protection, and side-mounted lugs. For interrupting capacity, the breaker is rated 22 kAIC at 600VAC, 30 kAIC at 480VAC, and 42 kAIC at 240VAC.

If you're working on existing or legacy equipment, getting the breaker number right is only part of the job. The physical setup and electrical ratings need to match, too. The NM632450 measures 15.5 inches high by 8.19 inches wide by 4.13 inches deep and carries a 40°C rating. Before using it as a replacement, compare the amperage, number of poles, mounting, terminals, dimensions, and AIC rating with the requirements of the equipment already in place. When the application calls for these specifications, the NM632450 provides the familiar form and function needed to keep compatible equipment in service. When installed correctly and used within its stated ratings, it's built to last.

Key Features and Benefits

• 450-amp rating for applications calling for this specific current rating
• 3-pole design for compatible three-pole equipment
• Type NM molded case circuit breaker
• Thermal-magnetic trip for overcurrent protection
• Bolt-on mounting for equipment designed around this connection style
• Load-side lug terminals included
• Rated 22k AIC at 600VAC
• Rated 30k AIC at 480VAC
• Rated 42k AIC at 240VAC
• 40°C rating
• Well suited to maintenance of compatible legacy electrical systems
• Useful where a form, fit, and functional replacement matching these specifications is required

Technical Specifications

• Part Number: NM632450
  
• Type: NM
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 450A
  
• Poles: 3
  
• Trip: Thermal-Magnetic
  
• Mounting: Bolt-On
  
• Temperature Rating: 40°C
  
• AIC @ 600VAC: 22k
  
• AIC @ 480VAC: 30k
  
• AIC @ 240VAC: 42k
  
• Height: 15.5 in.
  
• Width: 8.19 in.
  
• Depth: 4.13 in.
  
• Ship Weight: 38.00 lbs.
  
• Terminals: Load-Side Lug Terminals Included
  

Material Compliance and Certifications

• The available specifications for the NM632450 do not include specific material compliance, certification, or agency listing information. For that reason, you cannot assume certifications such as UL, CSA, or RoHS. If you need a specific listing or compliance requirement, request mechanical documentation.

Where It Works Best

• The NM632450 circuit breaker is best suited for existing electrical equipment that calls for a 450A, 3-pole Type NM breaker with bolt-on mounting and thermal-magnetic protection. This makes it especially relevant for maintenance work on older or legacy electrical distribution equipment where the goal isn't to change the original breaker configuration.
• For replacement work, start with the part number, but don't stop there. Check the breaker you're replacing against the 450A rating, three poles, Type NM configuration, voltage and AIC requirements, bolt-on mounting, load-side terminals, and physical dimensions.
• In other words, a 450 amp breaker isn't automatically the right 450 amp breaker. The complete set of specifications needs to match the equipment and application. A qualified electrical professional should confirm compatibility and installation and handle it in accordance with applicable electrical codes and equipment requirements.