Q221175AC - 175 Amp Circuit Breaker

Q221175AC - 175 Amp Circuit Breaker

When you're replacing a breaker in an existing electrical system, getting the details right matters. The Q221175AC is a 175-amp, 2-pole Q2 molded-case circuit breaker designed for compatible 120/240VAC applications. It uses a Q-frame, I-Line plug-on configuration with A-C phasing and thermal-magnetic operation. The breaker carries a 10 kA I.C. rating at 120/240 VAC and measures 7.88 inches high by 3.0 inches wide by 4.31 inches deep. Those details are worth checking carefully, especially when you're maintaining older equipment where the frame, mounting style, phasing, and physical size can matter just as much as the amp rating. For applications that specifically call for the Q221175AC configuration, this breaker provides the appropriate form, fit, and electrical function without adding features the system doesn't require. Its molded-case construction is built to last when the breaker is properly selected, installed, and used within its stated ratings.

Key Features and Benefits

• 175-amp rating for applications designed around this specific current rating.
• 2-pole configuration for compatible 120/240VAC electrical systems.
• 10k A.I.C. at 120/240VAC provides the specified interrupting rating.
• Thermal-magnetic trip design provides overcurrent protection using thermal and magnetic operating principles.
• Q2 type and Q-frame construction help identify the breaker when matching existing equipment.
• I-Line plug-on mounting is designed for equipment that accepts this connection style.
• A-C phasing matches installations requiring this particular phase arrangement.
• Compact molded-case design measures 7.88" H × 3.0" W × 4.31" D.
• A useful option for form, fit, and functional replacement when all application specifications match.

Technical Specifications

• Part Number: Q221175AC
  
• Type: Q2
  
• Frame: Q-Frame
  
• Amperage: 175A
  
• Poles: 2
  
• Voltage: 120/240VAC
  
• A.I.C. Rating: 10k @ 120/240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting: I-Line, Plug-On
  
• Phasing: A-C
  
• Construction: Molded Case Circuit Breaker
  
• Height: 7.88 in.
  
• Width: 3.0 in.
  
• Depth: 4.31 in.
  

Material Compliance and Certifications

• Certification and material compliance details were not included in the available specifications for Q221175AC. If your application requires a specific UL listing, CSA certification, RoHS status, or other compliance designation, check the breaker nameplate and applicable product documentation before installation. This is particularly important for installations where local codes or facility requirements call for specific approvals.

Where It Works Best

• The Q221175AC makes the most sense in existing or legacy electrical systems that were designed for this breaker configuration. It's a particularly relevant match when the application calls for a 175A, 2-pole Q2 breaker with a Q-frame, A-C phasing, and an I-Line plug-on connection.