QBA221252 - 125 Amp Circuit Breaker

QBA221252 - 125 Amp Circuit Breaker

If you’re looking for a dependable 125 amp, 2-pole circuit breaker for a 240VAC system, the QBA221252 PowerPact Q-Frame is a solid choice. This molded case breaker is built with a thermal magnetic trip mechanism, meaning it handles everyday overloads and sudden short circuits the way it should — tripping when necessary, staying put when it’s not. Rated at 10kA interrupting capacity at 240VAC, this breaker is designed for commercial and light industrial electrical distribution setups where fault protection is critical. It uses an I-Line, plug-on connection, which makes installation into compatible panelboards straightforward. For electricians and maintenance teams, that means less time wrestling with hardware and more time getting the job finished. At 125 amps, this breaker is commonly used to protect feeder circuits, larger branch circuits, HVAC equipment, lighting panels, and other 240V loads. The molded case construction helps protect the internal components inside the enclosure, supporting consistent performance over time. When you need reliable 240V overcurrent protection in a Q-Frame format, the QBA221252 does exactly what it’s built to do.

Key Features and Benefits

• 125 Amp rating for feeder and branch circuit applications
• 2-Pole configuration for 240VAC systems
• 10kA interrupting rating at 240VAC
• Thermal magnetic trip unit for overload and short-circuit protection
• I-Line plug-on mounting for quicker installation
• PowerPact Q-Frame design
• Molded case construction for long-term durability

Technical Specifications

• Part Number: QBA221252
  
• Frame Type: QBA (PowerPact Q-Frame)
  
• Poles: 2
  
• Amperage Rating: 125A
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity: 10kA @ 240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting Type: I-Line, Plug-On
  
• Phase: A-C
  
• Height: 7.88 in
  
• Ship Weight: 3.0 lbs
  

Material Compliance and Certifications

• Industry Standards: This molded case circuit breaker is built to meet applicable industry safety standards for overcurrent protection devices used in North American electrical systems, including relevant UL requirements. When installed in properly rated equipment, it provides protection consistent with code-compliant applications.

Where It Works Best

• The QBA221252 is a good fit for commercial buildings, retail spaces, office environments, and light industrial facilities running 240VAC power. It’s commonly installed in panelboards protecting HVAC units, lighting distribution, mechanical equipment, and general power circuits. If your panel requires a 125A, 2-pole I-Line breaker in a Q-Frame format, this model checks the boxes without overcomplicating the job.