NEB3B040B - 40Amp Circuit Breaker

NEB3B040B - 40Amp Circuit Breaker

When you're replacing a breaker in an existing panelboard, getting the details right matters. The NEB3B040B is a 40-amp, 3-pole molded-case circuit breaker made for compatible panelboard applications that use the NEB breaker type. It has an interrupting rating of 35 kAIC at 480VAC and 85 kAIC at 240VAC, along with a 40°C rating and HACR rating. The breaker measures about 5.5 inches high, 3 inches wide, and 3 inches deep, and includes load-side terminals. It's a useful option for maintaining legacy electrical equipment where the existing setup calls for this particular combination of breaker type, amperage, poles, mounting style, and interrupting capacity. Instead of redesigning the system around a different breaker, the NEB3B040B can be used when its form, fit, and electrical ratings match the original application. When installed correctly and operated within its specified ratings, it's built to last.

Key Features and Benefits

• 40-amp rating for compatible circuits requiring a 40A breaker.
• Three poles for applications designed around a 3-pole configuration.
• NEB molded case design for compatible existing panelboards and electrical equipment.
• Rated 35k AIC at 480VAC and 85k AIC at 240VAC.
• Panelboard mount configuration.
• HACR rated for applications where this rating is required.
• 40°C rated.
• Load-side terminals included as part of the breaker configuration.
• Well suited to maintenance and replacement work in legacy electrical systems where matching the existing breaker specifications is important.
• Built to last when properly installed and used within its stated ratings.
  

Technical Specifications

• Part Number: NEB3B040B
  
• Product Type: Molded Case Circuit Breaker
  
• Type: NEB
  
• Amperage: 40 Amps
  
• Poles: 3
  
• AIC Rating: 35k @ 480VAC; 85k @ 240VAC
  
• Mounting: Panelboard Mount
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  
• Height: 5.5 in.
  
• Width: 3.0 in.
  
• Depth: 3.0 in.
  

Material Compliance and Certifications

• The NEB3B040B is HACR rated and carries a 40°C rating. No additional material-compliance or certification information has been specified here. If a particular listing, certification, or material requirement matters for the installation, check the markings on the breaker and the documentation for the equipment it will be installed in.
  

Where It Works Best

• The NEB3B040B is best suited to compatible panelboards and legacy electrical systems that call for an NEB-type, 40 amp, 3-pole molded case circuit breaker with these ratings and dimensions. It's especially relevant for repair and maintenance jobs where keeping the existing equipment in service depends on finding a breaker with the correct form, fit, and function.
• Don't determine compatibility by amperage alone. Before installation, check the part number, breaker type, pole count, voltage, AIC rating, mounting arrangement, physical dimensions, and terminal configuration against the existing equipment's requirements. If those specifications line up, the NEB3B040B provides the configuration intended for that application.