NGB2B125B - 125 Amp Circuit Breaker

NGB2B125B - 125 Amp Circuit Breaker

Need to match an NGB2B125B circuit breaker in an existing panelboard? Start with the details that matter: amperage, poles, interrupting rating, dimensions, and mounting style. The NGB2B125B is a 125A, 2-pole Type NGB molded-case circuit breaker for your compatible panelboard applications. It carries an A.I.C. rating of 25kA at 480VAC and 100kA at 240VAC and measures 5.0 inches high, 2.0 inches wide, and 3.06 inches deep. It is also HACR rated, has a 40.25°C temperature rating, and includes load-side terminals. That combination of specifications makes this breaker particularly useful for existing or legacy electrical systems where matching the required form, fit, and function matters. Its molded-case construction is built to last in a properly specified application.

Key Features and Benefits

• 125-amp rating for systems that specify a 125A breaker.
• 2-pole configuration for compatible two-pole applications.
• Type NGB design for equipment requiring this particular breaker type.
• Panelboard mount configuration for compatible installations.
• Rated 25kA at 480VAC and 100kA at 240VAC.
• HACR rated for compatible heating, air-conditioning, and refrigeration applications where this rating is required.
• Load-side terminals included with the breaker configuration.
• Measures just 5.0" H x 2.0" W x 3.06" D, making dimensional comparison with an existing breaker straightforward.
• Molded case construction designed for its intended electrical distribution application.

Technical Specifications

• Part Number: NGB2B125B
  
• Type: NGB
  
• Breaker Type: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage: 125A
  
• A.I.C. Rating & Volts: 25kA @ 480VAC; 100kA @ 240VAC
  
• Temperature Rating: 40.25°C
  
• Mounting: Panelboard Mount
  
• HACR Rated: Yes
  
• Height: 5.0 in.
  
• Width: 2.0 in.
  
• Depth: 3.06 in.
  
• Terminals: Load-Side Terminals Included
  

Material Compliance and Certifications

• The NGB2B125B is HACR rated, making it appropriate for compatible heating, air-conditioning, and refrigeration applications when an HACR-rated breaker is specified. As with any replacement circuit breaker, don't rely on amperage alone when checking compatibility. Compare the complete specifications with the equipment requirements, including the part number, breaker type, number of poles, amperage, A.I.C. and voltage ratings, dimensions, mounting method, and terminal configuration.

Where It Works Best

• The NGB2B125B is a practical fit for existing and legacy Type NGB panelboard applications that call for its specific 125A, two-pole configuration. It can be especially useful during maintenance or replacement work where keeping the original electrical and physical configuration is the priority.