NM632300 - 300Amp Circuit Breaker

NM632300 - 300Amp Circuit Breaker

When you're replacing a circuit breaker in an existing electrical system, the details matter. The NM632300 is a 300-amp, 3-pole Type NM molded-case circuit breaker with a bolt-on design and thermal-magnetic trip operation. It's intended for compatible equipment that requires this breaker configuration and electrical ratings. The NM632300 is rated 22k AIC at 600VAC, 30k AIC at 480VAC, and 42k AIC at 240VAC, with a 40°C temperature rating. It measures 15.5 inches high, 8.19 inches wide, and 4.13 inches deep and includes load-side lug terminals. 

Key Features and Benefits

• 300-amp, 3-pole configuration for compatible electrical distribution applications.
• Type NM molded case design for equipment requiring this specific breaker style.
• Thermal-magnetic trip operation provides overcurrent protection for its intended application.
• Bolt-on mounting matches equipment designed for this installation method.
• Rated 22k AIC at 600VAC, 30k AIC at 480VAC, and 42k AIC at 240VAC.
• Includes load-side lug terminals for the specified connection arrangement.
• 40°C temperature rating.
• Built to last when matched, installed, and maintained correctly.

Technical Specifications

• Part Number: NM632300
  
• Type: NM
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 300A
  
• Poles: 3
  
• Trip Type: Thermal-Magnetic
  
• AIC Rating at 600VAC: 22k
  
• AIC Rating at 480VAC: 30k
  
• AIC Rating at 240VAC: 42k
  
• Mounting: Bolt-On
  
• Temperature Rating: 40°C
  
• 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

• Specific certification and material compliance information was not included with the available NM632300 specifications. For that reason, no UL, CSA, RoHS, or other certification claims are being made here.
  

Where It Works Best

• The NM632300 circuit breaker is best suited to compatible legacy electrical systems that require a 300A, 3-pole, Type NM bolt-on molded case circuit breaker. You can use it in compatible electrical distribution equipment, switchgear, industrial electrical systems, and similar installations designed around this breaker configuration.
• Need to determine whether it's the right fit? Don't rely on the 300 amp rating by itself. Check the NM type, three-pole configuration, bolt-on mounting, dimensions, terminal arrangement, voltage, and AIC ratings against the existing breaker and equipment requirements.
• That careful match is especially important with older electrical equipment. If the application calls for the NM632300 configuration, matching its mechanical and electrical specifications helps maintain the intended form, fit, and function of the existing system.