NGB1B125B - 125 Amp Circuit Breaker

NGB1B125B - 125 Amp Circuit Breaker

If you're looking for an NGB1B125B circuit breaker, you likely have a specific panel or existing installation you're trying to keep in service. This Type NGB molded case circuit breaker is rated at 125 amps and has a 1-pole configuration for compatible panelboard applications. It has interrupting ratings of 25kA at 277VAC and 100kA at 120VAC, and it is HACR rated. It measures 5.0 inches high, 1.0 inch wide, and 3.06 inches deep and includes load-side terminals. For maintenance work on older electrical equipment, those details matter. A breaker may have the right amperage but still not be right for the panel, so match the NGB1B125B part number, dimensions, mounting style, pole count, voltage, and A.I.C. ratings to the equipment you're working on. When those specifications line up, the NGB1B125B provides a practical way to maintain the original form, fit, and function of a compatible Type NGB installation. This straightforward electrical component is built to last in its intended application.

Key Features and Benefits

• 125-amp rating for applications requiring this specific amperage.
• Single-pole design for equipment requiring a 1-pole NGB breaker.
• Type NGB molded case construction for use with compatible electrical equipment.
• Rated 25kA at 277VAC and 100kA at 120VAC.
• HACR rated for applications where this rating is specified.
• Panelboard mount configuration.
• Load-side terminals are included.
• Compact 5.0" x 1.0" x 3.06" dimensions help maintain the required fit in compatible equipment.
• A useful form, fit, and functional replacement when servicing an existing installation that calls for the NGB1B125B.
  

Technical Specifications

• Part Number NGB1B125B
  
• Type NGB
  
• Product Type Molded Case Circuit Breaker
  
• Amperage 125A
  
• Poles 1
  
• A.I.C. Rating & Voltage 25kA @ 277VAC; 100kA @ 120VAC
  
• Mounting Panelboard Mount
  
• Height 5.0 in.
  
• Width 1.0 in.
  
• Depth 3.06 in.
  
• Temperature Reference 40.25°C
  
• HACR Rated Yes
  
• Load-Side Terminals Included
  

Material Compliance and Certifications

• The available specifications identify the NGB1B125B as HACR rated. No other material-compliance certifications or environmental declarations are specified in the product information provided.
• For jobs that require a particular certification or compliance standard, check the requirements of the panelboard, electrical system, and applicable local codes before installation. This is especially important when working with existing or legacy equipment where you must maintain the original system specifications.
  

Where It Works Best

• The NGB1B125B is best suited to compatible Type NGB panelboard applications, particularly maintenance and replacement work on existing electrical systems. It can be a good fit for facility maintenance, electrical repair, panel servicing, and restoration projects where the goal isn't to change the surrounding equipment—you need a breaker that matches the required specifications.
• Before using the NGB1B125B as a replacement, compare it with the breaker already installed. Check the 125A rating, 1-pole configuration, Type NGB designation, panelboard mounting, physical dimensions, voltage, and interrupting ratings. Matching those details is the best way to determine whether this breaker fits the application.