Q221150AC - 150 Amp Circuit Breaker

Q221150AC - 150 Amp Circuit Breaker

When you're replacing a breaker in existing equipment, getting the details right matters. The Q221150AC is a 150-amp, 2-pole Q2 molded-case circuit breaker with a Q-Frame design, A-C phasing, and an I-Line plug-on connection. It is rated 10 kA AIC at 120/240VAC and uses a thermal-magnetic trip mechanism to provide overload and short-circuit protection within its specified ratings. For replacement work, the physical fit is just as important as the electrical specifications. The Q221150AC measures 7.88 inches high, 3.0 inches wide, and 4.31 inches deep, making those dimensions useful when comparing it with an existing breaker or compatible equipment. This breaker is a practical option for maintaining legacy electrical systems in which the original Q2 configuration must be preserved. It's built to last and, when properly matched to the application, provides the form, fit, and function needed without changing the existing system setup.

Key Features and Benefits

• 150A, 2-pole design for applications requiring these specific circuit characteristics.
• 10 kA AIC at 120/240VAC to match equipment requiring this interrupting and voltage rating.
• Thermal-magnetic trip provides protection against overload and short-circuit conditions.
• Q2, Q-Frame configuration helps maintain the correct form and fit in compatible equipment.
• I-Line plug-on mounting allows the breaker to connect to the appropriate I-Line setup.
• A-C phasing makes it suitable for installations specifically requiring this phase arrangement.
• Clearly defined dimensions make it easier to compare physical fit before installation.
• Built to last when correctly installed and operated within its intended ratings and application.

Technical Specifications

• Part Number: Q221150AC
  
• Type: Q2
  
• Frame: Q-Frame
  
• Breaker Style: Molded Case Circuit Breaker
  
• Trip Type: Thermal Magnetic
  
• Mounting: I-Line, Plug-On
  
• Phasing: A-C
  
• Poles: 2
  
• Amperage: 150A
  
• AIC Rating: 10k
  
• Voltage: 120/240VAC
  
• Height: 7.88 in.
  
• Width: 3.0 in.
  
• Depth: 4.31 in.
  

Material Compliance and Certifications

• Specific certification, listing, and material-compliance information was not provided with the available specifications for the Q221150AC. Rather than make assumptions, these details should be confirmed using the markings on the individual breaker and the documentation for the equipment in which it will be installed. A qualified electrical professional should also verify applicable code requirements and confirm that the breaker's ratings and configuration are correct for the intended application.

Where It Works Best

• The Q221150AC makes the most sense when maintaining compatible legacy electrical equipment that already calls for this particular breaker configuration. It's especially relevant when you need a 150-amp, 2-pole Q2 breaker with a Q-Frame, I-Line plug-on connection, A-C phasing, and a 10k AIC rating at 120/240VAC.
• Before making the match, check the complete set of specifications rather than amperage alone. Confirm the part number, poles, voltage, interrupting rating, phasing, frame, mounting style, and dimensions against the existing equipment. When those details align, the Q221150AC can provide the required form, fit, and function as a replacement while keeping the original electrical system configuration intact.