NGB3B045B - 45 Amp Circuit Breaker

NGB3B045B - 45 Amp Circuit Breaker

The NGB3B045B is a 45-amp, 3-pole molded-case circuit breaker for use in compatible NGB panelboard applications. If you're replacing an existing breaker, the numbers matter more than the sales pitch. The breaker is rated 25k AIC at 480VAC and 100k AIC at 240VAC, measures 5.0" high x 3.0" wide x 3.06" deep, and includes load-side terminals. It is also HACR-rated. The NGB3B045B is a practical option for maintenance and replacement work when the existing equipment requires the same ratings, dimensions, and mounting configuration. It's built to last in the application it was designed for. Before putting it into service, compare the part number and electrical ratings with the breaker being replaced. Also check the physical dimensions, pole count, mounting style, and terminal arrangement. A breaker can look right at first glance, but those details determine whether it belongs in the equipment.

Key Features and Benefits

• 45 amp, 3-pole design for equipment that calls for this specific configuration.
• NGB molded case construction for compatible NGB applications.
• 25k AIC at 480VAC interrupting rating.
• 100k AIC at 240VAC interrupting rating.
• Designed for panelboard mounting.
• Load-side terminals included.
• HACR rated.
• Measures 5.0" H x 3.0" W x 3.06" D, giving you clear dimensions to check against the existing installation.
• Built to last when used within its intended ratings and application.

Technical Specifications

• Part Number: NGB3B045B
  
• Breaker Type: Molded Case Circuit Breaker
  
• Type / Series: NGB
  
• Amperage: 45A
  
• Poles: 3
  
• AIC Rating: 25k @ 480VAC; 100k @ 240VAC
  
• Height: 5.0 in.
  
• Width: 3.0 in.
  
• Depth: 3.06 in.
  
• Mounting: Panelboard Mount
  
• Terminals: Load-Side Terminals Included
  
• Additional Notes: 40.25C
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• The available specifications list the NGB3B045B as HACR-rated. No additional certification or material-compliance claims are made here without supporting product documentation.
• Always verify the equipment requirements and applicable electrical installation before using a replacement circuit breaker.

Where It Works Best

• This breaker is best suited to existing panelboards and electrical equipment designed for a compatible NGB Type breaker. It can be useful in repair and maintenance situations where you need to replace a 45 amp, 3-pole breaker while keeping the original equipment configuration intact.
• When checking an NGB3B045B for your application, don't stop at the 45 amp rating. Review the full set of specifications. Confirm the three poles, voltage, and AIC ratings, physical size, panelboard mounting, and load-side terminals against the existing breaker and equipment documentation. If those details match, you'll have a much better basis for determining whether this is the right form, fit, and functional replacement.