Q221175AB - 175 Amp Circuit Breaker

Q221175AB - 175 Amp Circuit Breaker

When you're replacing a breaker in an existing electrical system, the small details matter. The Q221175AB is a Q2, 175-amp, 2-pole molded-case circuit breaker designed for compatible Q-Frame applications. It uses an I-Line plug-on connection, has A-B phasing, and features a thermal-magnetic trip design. Its interrupting rating is 10 kA at 120/240VAC.

For maintenance work on legacy equipment, matching the original breaker as closely as possible can save a lot of unnecessary guesswork. That means looking beyond amperage. Frame type, phasing, mounting, voltage, pole count, interrupting rating, and physical size all play a part. The Q221175AB measures 7.88 inches high, 3.0 inches wide, and 4.31 inches deep, making these dimensions useful for checking against the breaker already installed.

This breaker is a practical fit for applications specifically designed around its Q2 and Q-Frame configuration. Its molded-case construction is built to last, while the thermal-magnetic mechanism provides overload and short-circuit protection within the breaker's specified ratings. If you're maintaining an existing system and need to preserve its original form, fit, and function, the Q221175AB provides a clearly defined set of specifications to match before installation.

Key Features and Benefits

• 175A, 2-pole configuration for equipment requiring these specific electrical characteristics.
• 10 kA rating at 120/240 VAC for applications requiring this interrupting capacity and voltage.
• Thermal-magnetic trip mechanism provides overload and short-circuit protection within the breaker's rated application.
• Q2 type and Q-Frame construction help identify the correct physical and electrical configuration for compatible equipment.
• I-Line plug-on design matches systems built to accept this connection style.
• A-B phasing suits installations that require this phase arrangement.
• Defined physical dimensions make it easier to compare form and fit with an existing breaker.
• Molded case construction provides a durable housing built to last in its intended application.

Technical Specifications

• Part Number: Q221175AB
  
• Type: Q2
  
• Frame: Q-Frame
  
• Breaker Type: Molded Case Circuit Breaker
  
• Trip Mechanism: Thermal Magnetic
  
• Poles: 2
  
• Amperage: 175A
  
• A.I.C. Rating: 10 kA
  
• Voltage Rating: 120/240VAC
  
• Phasing: A-B
  
• Mounting: I-Line, Plug-On
  
• Height: 7.88 in.
  
• Width: 3.0 in.
  
• Depth: 4.31 in.
  

Material Compliance and Certifications

• Specific certification, listing, and material-compliance information is not included in the available specifications for the Q221175AB. If your installation requires a particular certification or compliance standard, check the labeling on the individual breaker and the applicable technical documentation before installation.
• As with any circuit breaker replacement, installation should be completed by qualified electrical personnel and in accordance with applicable electrical codes and equipment requirements.

Where It Works Best

• The Q221175AB circuit breaker is intended for compatible legacy electrical equipment requiring a 175A, 2-pole Q2 breaker with Q-Frame construction, A-B phasing, and an I-Line plug-on connection. It is especially relevant for maintenance and replacement work where keeping the existing electrical system's specified configuration is important.