NFJ631175 - 175Amp Circuit Breaker

NFJ631175 - 175Amp Circuit Breaker

The NFJ631175 is a 175-amp, 3-pole molded-case circuit breaker for compatible equipment that uses an NFJ-style breaker. It has a bolt-on mounting configuration and a thermal-magnetic trip. Electrical ratings are 22k AIC at 480VAC and 25k AIC at 240VAC, with a 40°C rating. Load-side lug terminals are included.

For replacement work, check more than just the number printed on the breaker. Size, mounting, amperage, poles, and interrupting rating must match the equipment. The NFJ631175 measures 9.31" high x 4.13" wide x 3.75" deep, giving you another set of details to compare with the breaker being replaced. You may also come across this breaker under the NFJ434175 part number.

This is primarily a replacement part for existing and legacy electrical equipment where you need to maintain the original NFJ configuration. The purpose is straightforward. If your equipment calls for this breaker type and these ratings, the NFJ631175 gives you the required form, fit, and function without changing the original setup. Properly matched and used within its ratings, it is built to last.

Key Features and Benefits

• 175A rating for applications requiring this amperage and breaker configuration.
• 3-pole design for compatible three-pole installations.
• Thermal-magnetic trip provides overcurrent and short-circuit protection within the stated ratings.
• Bolt-on mounting for equipment designed around this breaker style.
• Rated 22k AIC at 480VAC and 25k AIC at 240VAC.
• Load-side lug terminals are included.
• 40°C rating.
• Also identified as NFJ434175, which may be useful when checking an existing breaker, equipment records, or previous part references.
• Intended for applications where maintaining the existing NFJ breaker configuration is important.

Technical Specifications

• Part Number: NFJ631175
  
• Also Known As: NFJ434175
  
• Type: NFJ
  
• Product: Molded Case Circuit Breaker
  
• Amperage: 175A
  
• Poles: 3
  
• Trip Type: Thermal Magnetic
  
• Mounting: Bolt-On
  
• AIC / Voltage 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

• Specific certification and material compliance information was not provided with the available NFJ631175 specifications. Rather than assume a listing or certification, check the breaker markings and the applicable product documentation when a particular approval or compliance requirement applies to the job.

Where It Works Best

• The NFJ631175 circuit breaker is best suited to existing electrical equipment designed for an NFJ 175A, 3-pole, bolt-on breaker with matching ratings. That makes it particularly relevant for repair and maintenance work on legacy electrical systems where keeping the original breaker arrangement is necessary.
• Before installation, compare the breaker with the equipment requirements. Check the 175 amp rating, three poles, bolt-on mounting, thermal-magnetic trip, AIC, voltage ratings, dimensions, and terminal configuration. These details determine whether the breaker is appropriate for the application.
• For the right equipment, the NFJ631175 does exactly what a replacement component needs to do: match the required configuration and keep the existing system in its intended form. A qualified electrical professional should confirm compatibility before installation.