NGB3B125B - 125 Amp Circuit Breaker

NGB3B125B - 125 Amp Circuit Breaker

The NGB3B125B is a 125-amp, 3-pole molded-case circuit breaker for compatible panelboard installations. This NGB-type breaker has an interrupting rating of 25 kA at 480VAC and 100 kA at 240VAC. Physical size is 5 inches high, 3 inches wide, and 3.06 inches deep. The breaker is HACR-rated and includes load-side terminals. If you're replacing an existing breaker, check these details closely. Having the same 125 amp rating doesn't automatically mean two breakers are interchangeable. The pole count, voltage, interrupting rating, mounting arrangement, dimensions, and equipment requirements must match the application. If your panelboard requires the NGB3B125B circuit breaker, this unit provides the original NGB-type configuration and ratings shown below.

Key Features and Benefits

• 125-amp, 3-pole breaker for compatible electrical applications.
• 25kA A.I.C. at 480VAC.
• 100kA A.I.C. at 240VAC.
• Molded case construction.
• Designed for panelboard mounting.
• HACR rated.
• Load-side terminals included.
• Measures 5" H x 3" W x 3.06" D.
• 40.25°C rating.
  

Technical Specifications

• Part Number: NGB3B125B
  
• Type: NGB
  
• Product Type: Molded Case Circuit Breaker
  
• Amps: 125A
  
• Poles: 3
  
• A.I.C. @ 480VAC: 25kA
  
• A.I.C. @ 240VAC: 100kA
  
• Mounting: Panelboard Mount
  
• HACR Rated: Yes
  
• Rating: 40.25°C
  
• Load-Side Terminals: Included
  
• Height: 5.0 in.
  
• Width: 3.0 in.
  
• Depth: 3.06 in.
  

Material Compliance and Certifications

• The NGB3B125B is HACR rated. This rating may be important when matching the breaker to qualifying heating, air-conditioning, or refrigeration equipment.
• Beyond the HACR rating, the available specifications did not include additional material compliance information or certifications. If a particular listing, certification, or material standard is required for the job, confirm it against the appropriate equipment documentation.
  

Where It Works Best

• The NGB3B125B is primarily suited to compatible panelboard applications requiring a 125-amp, three-pole NGB breaker. You may use it in commercial or industrial electrical systems when its ratings match the equipment and circuit requirements.
• For replacement work, start with the existing breaker rather than amperage alone. If the equipment calls for NGB3B125B, compare the full set of specifications before installation, especially the 125A rating, three poles, voltage, A.I.C. rating, mounting style, and physical dimensions.
• The breaker may also be appropriate for qualifying HACR applications. Base final breaker selection on the requirements of the electrical equipment and applicable electrical codes. Qualified electrical personnel should perform the installation.