NFJ631225 - 225Amp Circuit Breaker

NFJ631225 - 225Amp Circuit Breaker

Need an NFJ631225 circuit breaker for an existing electrical setup? This 225-amp, 3-pole molded case circuit breaker is an NFJ-type breaker with a bolt-on design and thermal-magnetic trip operation. It is rated 22k A.I.C. at 480VAC and 25k A.I.C. at 240VAC, with a 40°C temperature rating.

For replacement work, the small details can make a big difference. The NFJ631225 measures 9.31 inches high, 4.13 inches wide, and 3.75 inches deep, and includes load-side lug terminals. Those specifications give maintenance teams and electricians several important points to compare against the breaker already installed in the equipment.

You may also see the part number NFJ434225 when checking older equipment, maintenance records, or breaker markings. This is another known part number for the NFJ631225. That can be particularly helpful when you're trying to identify the correct form, fit, and functional replacement without changing the original equipment configuration.

The NFJ631225 is built to last and is intended for compatible electrical systems requiring its specific combination of 225A capacity, three poles, bolt-on mounting, thermal-magnetic operation, dimensions, and interrupting ratings.

Key Features and Benefits

• 225-amp rating for compatible electrical distribution applications.
• 3-pole design for equipment requiring this pole configuration.
• Thermal-magnetic trip provides overcurrent protection.
• Bolt-on mounting for compatible NFJ breaker applications.
• Rated 22k A.I.C. at 480VAC and 25k A.I.C. at 240VAC.
• Includes load-side lug terminals for the required load connections.
• 40°C temperature rating.
• NFJ molded case construction designed for compatible electrical equipment.
• Also known as NFJ434225, which can help when cross-referencing older equipment and documentation.
• Built to last when selected, installed, and maintained correctly.

Technical Specifications

• Part Number: NFJ631225
  
• Also Known As: NFJ434225
  
• Type: NFJ
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 225 Amps
  
• Poles: 3
  
• Trip: Thermal-Magnetic
  
• Mounting: Bolt-On
  
• A.I.C. Rating: 22k @ 480VAC; 25k @ 240VAC
  
• 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 NFJ631225 do not include material compliance information or specific agency certifications. Rather than assume a certification or listing, check the breaker nameplate and applicable product documentation when a particular approval is required for the installation.
• Confirm local electrical codes and equipment requirements before installing the breaker.

Where It Works Best

• The NFJ631225 225 amp circuit breaker suits existing and legacy electrical equipment designed for a compatible NFJ 3-pole bolt-on breaker. It's a practical fit for maintenance and replacement projects where maintaining the original form, fit, and electrical characteristics matters.
• When matching a replacement breaker, don't stop at the 225 amp rating. Also check the three-pole configuration, bolt-on mounting, dimensions, thermal-magnetic trip, voltage and A.I.C. ratings, and terminal arrangement. These details help determine whether the breaker fits the equipment you're working on.
• If the breaker or older documentation you're working from shows NFJ434225, that alternate part number can also help identify the NFJ631225.
• As with any circuit breaker replacement, confirm all electrical and physical specifications against the equipment requirements before installation. The right breaker matches the application—not simply one with the same amperage.