NFJ631125R - 125Amp Circuit Breaker

NFJ631125R - 125Amp Circuit Breaker

If you're replacing an NFJ631125R, the details matter. This 125A, 3-pole molded-case circuit breaker is a Type NFJ unit with a bolt-on design, thermal-magnetic trip, and rotary handle. It includes load-side lug terminals and is rated 22kA at 480VAC and 25kA at 240VAC. The breaker is also rated at 40°C.

For replacement work, size can be just as important as the electrical ratings. The NFJ631125R measures 9.31 inches high, 4.13 inches wide, and 3.75 inches deep. Check those dimensions, along with the mounting style, pole configuration, amperage, handle type, and interrupting ratings, against your existing equipment requirements.

This breaker is a practical choice for maintaining compatible legacy electrical systems that were designed around the NFJ631125R configuration. Its molded case construction and straightforward thermal-magnetic design are built to last when properly installed and used within the specified ratings.

Key Features and Benefits

• 125-amp, 3-pole design for compatible electrical applications.
• Type NFJ molded case configuration for systems requiring this specific breaker type.
• Bolt-on mounting matches equipment designed for bolt-on breaker installation.
• The thermal-magnetic trip provides the required circuit protection within the breaker's stated ratings.
• The rotary-type handle provides a simple operating interface.
• Includes load-side lug terminals for the required load connection.
• Interrupting ratings of 22kA at 480VAC and 25kA at 240VAC.
• 40°C rated for applications requiring this temperature rating.

Technical Specifications

• Part Number: NFJ631125R
  
• Type: NFJ
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 125A
  
• Poles: 3
  
• A.I.C. Rating & Volts: 22kA @ 480VAC; 25kA @ 240VAC
  
• Trip Type: Thermal-Magnetic
  
• Mounting: Bolt-On
  
• Handle Type: Rotary Type Handle
  
• Temperature Rating: 40°C
  
• Terminals: Load-Side Lug Terminals Included
  
• Height: 9.31 in.
  
• Width: 4.13 in.
  
• Depth: 3.75 in.
  
• Ship Weight: 12.00 lbs. 
  

Material Compliance and Certifications

• The available specifications for the NFJ631125R don't include specific material compliance, certification, or listing information. If your installation requires a particular certification or listing, confirm that information from the markings or documentation supplied with the individual breaker.
• As with any circuit breaker replacement, check the breaker against the equipment requirements and applicable electrical codes before installation.

Where It Works Best

• The NFJ631125R is best suited for maintenance and replacement applications involving compatible legacy electrical distribution equipment that requires this particular NFJ breaker configuration.
• Before using it as a replacement, check more than the 125A rating. You'll also want to confirm the three-pole configuration, NFJ type, bolt-on mounting, voltage and A.I.C. ratings, rotary handle, terminal arrangement, and physical dimensions. Those details help determine whether the breaker provides the correct form, fit, and function for the equipment you're servicing.