NEB1B125B - 125 Amp Circuit Breaker

NEB1B125B - 125 Amp Circuit Breaker

When you replace a breaker in an existing panelboard, the details must match. The NEB1B125B is a 125-amp, 1-pole Type NEB molded-case circuit breaker made for compatible panelboard applications. It has an interrupting rating of 35k AIC at 277VAC and 85k AIC at 120VAC, with a compact footprint of about 5.5 inches high, 1 inch wide, and 3 inches deep. This breaker is HACR-rated and includes load-side terminals. It also carries a listed temperature specification of 40.25°C. For maintenance work involving an existing or legacy electrical system, the NEB1B125B can be a good fit when the original equipment calls for this particular breaker type, mounting style, and electrical configuration. It's a straightforward molded case breaker built to last and designed to do the job it was made for. Before installation, check the part number and ratings against the existing breaker and panelboard to ensure everything matches.

Key Features and Benefits

• 125-amp rating for equipment designed around this specific current rating.
• Single-pole design for compatible 1-pole applications.
• Type NEB molded case construction for systems that require this breaker style and configuration.
• Rated 35k AIC at 277VAC and 85k AIC at 120VAC.
• Panelboard mount configuration for compatible electrical equipment.
• HACR-rated for applications where an HACR-rated breaker is specified.
• Load-side terminals are included.
• At only 1 inch wide, the breaker maintains the compact dimensions associated with this configuration.
• Built for lasting service when correctly matched, installed, and maintained.

Technical Specifications

• Part Number: NEB1B125B
  
• Type: NEB
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 125A
  
• Poles: 1
  
• AIC / Voltage Rating: 35k @ 277VAC; 85k @ 120VAC
  
• Dimensions:
  • Height: 5.5 in.
  • Width: 1.0 in.
  • Depth: 3.0 in.
• Mounting: Panelboard Mount
  
• Temperature Specification: 40.25°C
  
• HACR Rated: Yes
  
• Terminals: Load-Side Terminals Included
  

Material Compliance and Certifications

• Based on the available specifications, the NEB1B125B is HACR rated. The available product details don't include additional material-compliance information or certifications, so we won't assume undocumented certifications.
• If your project requires a particular certification or material-compliance standard, check the applicable product documentation before putting the breaker into service.

Where It Works Best

• The NEB1B125B is best suited to existing panelboards and legacy electrical equipment designed to accept a Type NEB 125 amp, 1-pole molded case circuit breaker with these ratings and dimensions. This can include compatible commercial, industrial, facility-maintenance, and HVAC-related electrical applications.
• For replacement work, don't go by amperage alone. Take a minute to compare the existing breaker with the NEB1B125B part number, pole count, voltage, and AIC ratings, physical dimensions, mounting style, and terminal configuration. Those details matter when you're trying to maintain an electrical system's original form, fit, and function.
• As with any circuit breaker replacement, confirm compatibility and have qualified electrical personnel install it in accordance with the equipment requirements and applicable electrical codes.