NJL631400 - 400Amp Circuit Breaker

NJL631400 - 400Amp Circuit Breaker

Need an NJL631400 for an existing electrical system? This is a 400-amp, 3-pole molded-case circuit breaker with a bolt-on design and thermal-magnetic trip protection. It includes load-side lug terminals and is rated 22k AIC at 600VAC, 30k AIC at 480VAC, and 42k AIC at 240VAC. The breaker measures about 10.13 inches high, 8.25 inches wide, and 3.88 inches deep, so check those dimensions when matching it to existing equipment. You'll also see this breaker identified as NJL632400, an alternate part number that may appear on equipment records or other reference material. For electricians and maintenance teams working with legacy NJL equipment, the main advantage here is straightforward: you can match the breaker by its actual specifications—400 amps, three poles, bolt-on mounting, interrupting rating, dimensions, and terminal configuration. When installed correctly and used within its specified ratings, it's built to last.

Key Features and Benefits

• 400A, 3-pole design for electrical equipment requiring this specific NJL configuration.
• Thermal-magnetic trip protection provides overcurrent and short-circuit protection.
• Bolt-on mounting matches equipment designed to accept this breaker style.
• Rated 22k AIC at 600VAC, 30k AIC at 480VAC, and 42k AIC at 240VAC.
• Load-side lug terminals are included.
• 40°C rating for the specified application conditions.
• Also identified as NJL632400, which can be useful when checking older records or existing equipment.
• Well suited to legacy system maintenance and replacement where matching the original breaker specifications is important.
• Designed and built for lasting service within its intended application and ratings.

Technical Specifications

• Part Number: NJL631400
  
• Alternate Part Number: NJL632400
  
• Type: NJL
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 400A
  
• Poles: 3
  
• Trip Type: Thermal Magnetic
  
• Mounting: Bolt-On
  
• AIC Rating: 22k @ 600VAC
  
• AIC Rating: 30k @ 480VAC
  
• AIC Rating: 42k @ 240VAC
  
• Temperature Rating: 40°C
  
• Height: 10.13 in.
  
• Width: 8.25 in.
  
• Depth: 3.88 in.
  
• Ship Weight: 23.00 lbs.
• Load-Side Lug Terminals: Included
  

Material Compliance and Certifications

• The available specifications for the NJL631400 did not include material-compliance information or specific agency certifications. If a particular listing, certification, or material requirement applies to your installation, check the markings on the individual breaker and verify them against the equipment and application requirements.
• Always base breaker selection on the full set of electrical and physical requirements—not amperage or appearance alone. Confirm the part number, voltage, interrupting rating, pole count, mounting method, terminal configuration, and dimensions before installation.

Where It Works Best

• The NJL631400 makes the most sense in compatible electrical distribution equipment where an NJL-type, 400 amp, 3-pole breaker is already specified. This is especially relevant when maintaining legacy equipment, and the goal is to preserve the required form, fit, and function of the existing system.
• If you're replacing an existing breaker, check what's actually on the equipment before matching it. Look for NJL631400 or NJL632400, then verify the 400A rating, three-pole configuration, voltage and AIC requirements, bolt-on mounting, dimensions, and lug arrangement. Those details matter. Two breakers can look similar and still have different application requirements.
• For facility maintenance, electrical repair, and replacement work, the NJL631400 provides a clear set of specifications that makes it easier to determine whether it matches the equipment already in service.