MBK125A - 125Amp Circuit Breaker

MBK125A - 125Amp Circuit Breaker

When you’re replacing a main breaker, the catalog number is important—but it isn’t the only thing worth checking. The MBK125A is a 125-amp, 2-pole main circuit breaker rated for 120/240V, with a 22kA interrupting rating. It is identified as an EQ8682 main and is part of the Meter Load Center Combo Mains product family. The manufacturer also describes the MBK125A as a 1-phase load center conversion kit main breaker. That gives you several concrete specifications to compare with the breaker and equipment already in place.

Key Features and Benefits

• 125 Amp Rating: Designed for applications that require a 125A main breaker.
• 2-Pole Configuration: An important detail to match against the existing breaker and electrical equipment.
• 120/240V: The stated voltage rating makes application checks more straightforward.
• EQ8682 Main: This designation provides another useful identifier when checking an existing installation.
• 1-Phase Application: Described by the manufacturer as a single-phase load center conversion kit main breaker.
• Known Product Family: Identified under Meter Load Center Combo Mains.
• Useful for Replacement Matching: The catalog number, amperage, pole count, voltage, and interrupting rating give you specific points to compare rather than relying on appearance alone.
• Built to Last: Solid construction suited to its intended electrical application when properly selected, installed, and maintained.

Technical Specifications

• Catalog Number / MFN: MBK125A
  
• Article Number: US2\:MBK125A
  
• Product Type: Main Circuit Breaker
  
• Manufacturer Description: BREAKER 125A 2P 120/240V 22K EQ8682 MAIN
  
• Product Family: Meter Load Center Combo Mains
  
• Application Description: Load Center Conversion Kit Main Breaker
  
• Amperage: 125A
  
• Poles: 2
  
• Phase: 1-Phase
  
• Voltage Rating: 120/240V
  
• Interrupting Rating / AIR: 22kA
  
• Main Breaker Designation: EQ8682 Main
  
• Net Weight: 0.794 lb
  
• UPC: 783643388000
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The supplied specifications do not identify a specific UL, IEC, or other agency certification for the MBK125A, so I would not add one to the product description without supporting documentation.

Where It Works Best

The MBK125A makes sense for compatible existing equipment that specifically requires a 125-amp, 2-pole, 120/240V main circuit breaker with a 22kA interrupting rating and the appropriate EQ8682 main configuration.