QBA221254 - 125 Amp Circuit Breaker

QBA221254 - 125 Amp Circuit Breaker

The QBA221254 is a 125 amp, 2-pole molded case circuit breaker built for use in PowerPact Q-Frame I-Line distribution equipment. It’s rated for 240VAC applications with a 10kA interrupting capacity and uses a thermal magnetic trip unit to protect against overloads and short circuits.

This breaker is designed specifically for I-Line, plug-on installations and features a B-C phase configuration. That means it’s intended to match the layout of compatible panelboards and switchboards where proper alignment matters. If you’re replacing an existing QBA breaker, maintaining a facility panel, or sourcing a direct-fit unit for a commercial or industrial system, this model is built to provide the correct form, fit, and function.

The molded case construction is made for long service life in demanding environments, and the internal trip mechanism is calibrated to respond to both sustained overloads and instantaneous fault conditions.

Key Features and Benefits

• 125 amp current rating
• 2-pole configuration
• 10kA interrupting rating at 240VAC
• Thermal magnetic trip protection
• PowerPact Q-Frame design
• I-Line plug-on mounting
• B-C phase configuration
• Molded case construction built to last

Technical Specifications

• Part Number: QBA221254
  
• Frame Type: QBA (PowerPact Q-Frame)
  
• Poles: 2
  
• Amperage: 125A
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity: 10kA @ 240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting: I-Line, Plug-On
  
• Phase Position: B-C
  
• Height: 7.88 inches
  
• Approximate Shipping Weight: 3.0 lbs
  

Material Compliance and Certifications

• The QBA221254 is manufactured to meet applicable industry standards for molded case circuit breakers and is intended for installation in accordance with the National Electrical Code (NEC). It is constructed using insulated molded materials and calibrated trip components consistent with recognized electrical safety requirements.

Where It Works Best

• Commercial buildings using I-Line panelboards
• Industrial facilities operating 240VAC distribution systems
• Manufacturing environments with Q-Frame equipment
• Maintenance and replacement projects requiring QBA frame compatibility