NEB2B125B - 125 Amp Circuit Breaker

NEB2B125B - 125 Amp Circuit Breaker

Need an NEB2B125B circuit breaker for an existing panelboard? This Type NEB molded-case circuit breaker is rated at 125 amps and has a 2-pole configuration, making it a good fit for electrical systems specifically designed around these specifications. It carries an interrupting rating of 35 kA.I.C. at 480VAC and 85 kA.I.C. at 240VAC. The breaker is panelboard-mounted and measures approximately 5.5 inches high, 2 inches wide, and 3 inches deep. It is also HACR-rated, has a 40.25°C temperature rating, and comes with load-side terminals. For electricians and maintenance teams working on older electrical equipment, those details matter. A breaker may look similar from the outside but still have different electrical ratings, dimensions, or mounting requirements. That's why you should consider the NEB2B125B by its complete set of specifications—not just its amperage. When your existing equipment calls for this particular Type NEB configuration, it offers the form, fit, and function needed to help keep the original system configuration intact. This straightforward, well-built circuit breaker is designed to last when installed and used within its specified ratings.

Key Features and Benefits

• 125-amp rating for compatible electrical distribution applications.
• 2-pole design for systems requiring this specific pole configuration.
• Type NEB molded case construction for compatible panelboard equipment.
• 35k A.I.C. at 480VAC and 85k A.I.C. at 240VAC interrupting ratings.
• Panelboard mount configuration for applications designed around this mounting style.
• HACR rated for compatible applications where an HACR-rated breaker is required.
• Load-side terminals included as part of the breaker configuration.
• Measures approximately 5.5" H × 2.0" W × 3.0" D, making it easier to compare against the breaker being replaced.
• A practical choice for legacy electrical equipment where maintaining the correct form, fit, and electrical specifications is important.
• Built to last when properly installed and operated within its intended application and ratings.
  

Technical Specifications

• Part Number: NEB2B125B
  
• Type: NEB
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 125A
  
• Poles: 2
  
• A.I.C. Rating: 35k @ 480VAC; 85k @ 240VAC
  
• Mounting: Panelboard Mount
  
• Height: 5.5 in.
  
• Width: 2.0 in.
  
• Depth: 3.0 in.
  
• Temperature Rating: 40.25°C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  

Material Compliance and Certifications

• The NEB2B125B is HACR rated. Beyond that designation, the available specifications did not include additional certification or material-compliance information.
• If a particular installation requires verification of UL, CSA, RoHS, REACH, or another certification or material standard, check the applicable product documentation and equipment requirements rather than assuming compliance.
  

Where It Works Best

• The NEB2B125B is best suited for existing panelboards and legacy electrical distribution equipment that call for this particular Type NEB breaker configuration. It's especially relevant when you're replacing a breaker and need to stay with the specified 125A rating, 2-pole design, physical dimensions, panelboard mounting arrangement, and A.I.C. ratings.
• With older electrical equipment, matching the part number is an important starting point, but it shouldn't be the only check. Before installation, compare the existing breaker and equipment requirements for amperage, poles, voltage, interrupting capacity, dimensions, mounting, and terminal configuration.
• In short, the NEB2B125B is intended for situations where compatibility matters more than changing the original system design. Qualified electrical personnel should always confirm installation and final compatibility using the requirements of the specific panelboard and applicable electrical codes.