NGB3B040B - 40 Amp Circuit Breaker

NGB3B040B - 40 Amp Circuit Breaker

The NGB3B040B is a 40-amp, 3-pole molded-case circuit breaker designed for panelboard mounting. It is part of the NGB breaker family and is intended for electrical equipment that requires this particular configuration. The breaker is rated 25kA at 480VAC and 100kA at 240VAC and is also HACR rated. Load-side terminals are included. Physically, the breaker measures 5 inches high, 3 inches wide, and 3.06 inches deep. Those measurements matter when you're replacing a breaker in an existing panel, since amperage alone doesn't determine whether a replacement will fit or work correctly. For maintenance of older electrical equipment, the NGB3B040B is a practical option when the original installation calls for the same NGB type, 40A rating, three-pole arrangement, mounting style, and interrupting ratings. Its molded case construction is built to last when installed and used within the specified electrical ratings.

Key Features and Benefits

• 40 amp rating for equipment requiring a 40A breaker.
• Three poles for compatible three-pole applications.
• NGB-type molded-case circuit breaker.
• 25kA A.I.C. at 480VAC.
• 100kA A.I.C. at 240VAC.
• HACR rated for applicable HVAC and refrigeration equipment.
• Made for panelboard mounting.
• Load-side terminals included.
• Measures 5" H x 3" W x 3.06" D.
• Useful for maintaining existing equipment when you need to match the original breaker specifications.

Technical Specifications

• Part Number: NGB3B040B
  
• Breaker Type: Molded Case Circuit Breaker
  
• Type: NGB
  
• Amperes: 40A
  
• Poles: 3
  
• A.I.C. Rating: 25kA @ 480VAC; 100kA @ 240VAC
  
• Mounting: Panelboard Mount
  
• Height: 5.0 in.
  
• Width: 3.0 in.
  
• Depth: 3.06 in.
  
• Temperature Rating: 40.25°C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  

Material Compliance and Certifications

• The NGB3B040B is HACR rated. This designation is relevant when the breaker is used with compatible heating, air-conditioning, and refrigeration equipment. The available specifications also list a 40.25°C rating.
• Other certifications or material compliance declarations are not included in the available product information. If a job requires a specific certification or approval, verify the markings on the breaker and the equipment requirements before installation.

Where It Works Best

• This breaker is best suited for existing panelboards and legacy electrical equipment that call for an NGB breaker with these ratings and dimensions. It can be used for replacement and maintenance when you need to keep the original breaker configuration.
• When matching the NGB3B040B to an existing installation, check the full specification, not just the 40 amp rating. Pole count, breaker type, voltage, A.I.C. rating, mounting arrangement, and physical size all matter. If those details match the equipment requirements, the NGB3B040B provides the appropriate form, fit, and function for the application.