QBA221751 - 175 Amp Circuit Breaker

QBA221751 - 175 Amp Circuit Breaker

The QBA221751 is a 175 amp, 2-pole molded case circuit breaker designed for use in PowerPact® Q-Frame I-Line panelboard systems. Rated at 10kA interrupting capacity at 240VAC, this breaker is built to provide dependable overload and short-circuit protection in commercial and industrial electrical distribution setups. Its plug-on I-Line mounting and A-B phase configuration allow for proper fit and alignment in compatible equipment, making it a practical solution when maintaining or servicing existing Q-Frame installations. This model uses a thermal magnetic trip mechanism, meaning it responds to sustained overloads with time-delayed protection and reacts instantly to short circuits. That combination makes it well-suited for feeder and branch circuit applications where consistent protection is required. The molded case housing is designed for long-term durability in demanding environments, helping support safe and reliable system operation.

Key Features and Benefits

• 175 amp continuous current rating
• 2-pole configuration for 240VAC systems
• 10kA interrupting rating at 240VAC
• Thermal magnetic trip for combined overload and short-circuit protection
• Q-Frame construction for proper form and fit
• I-Line plug-on mounting for compatible panelboards
• A-B phase design for correct system alignment
• Molded case construction built for lasting service

Technical Specifications

• Part Number: QBA221751
  
• Series: PowerPact Q-Frame
  
• Breaker Type: Molded Case Circuit Breaker
  
• Trip Type: Thermal Magnetic
  
• Amperage: 175A
  
• Poles: 2
  
• Voltage Rating: 240VAC
  
• Interrupting Rating: 10kA @ 240VAC
  
• Mounting: I-Line, Plug-On
  
• Phase: A-B
  
• Frame Type: QBA
  
• Height: 7.88 inches
  
• Approximate Shipping Weight: 3.0 lbs
  

Material Compliance and Certifications

• The QBA221751 is manufactured to meet applicable UL standards for molded case circuit breakers and is designed for installation in properly rated equipment in accordance with NEC requirements. Always confirm compatibility with your panelboard or switchboard before installation.

Where It Works Best

• This breaker is commonly used in commercial buildings, industrial facilities, and institutional properties that rely on PowerPact Q-Frame I-Line distribution systems. It works well in feeder circuits and higher-capacity branch circuits where a 175A, 2-pole breaker is required.