Q221125AB - 125 Amp Circuit Breaker

Q221125AB - 125 Amp Circuit Breaker

Finding the right breaker for older electrical equipment often comes down to the details. Q221125AB is a 125-amp, 2-pole Q2 molded-case circuit breaker with a 10k AIC rating at 120/240VAC. It uses a Q-frame design with A-B phasing, thermal-magnetic operation, and an I-Line plug-on connection. If you're replacing an existing breaker, those specifications are important because amperage is only one part of getting the right match. The Q221125AB measures 7.88 inches high, 3 inches wide, and 4.31 inches deep so that you can compare its size, mounting style, and electrical ratings with the breaker already in your equipment. Its molded-case construction is built to last when used for the application for which it was designed. For electricians, maintenance crews, and facility teams working on compatible legacy systems, this breaker is a practical choice when the job calls for the same form, fit, and function.

Key Features and Benefits

• 125-amp rating for equipment designed around this specific current requirement.
• 2-pole design for compatible 120/240VAC applications.
• Rated 10 kA at 120/240VAC.
• Thermal-magnetic trip operation provides overcurrent protection in accordance with the breaker's design characteristics.
• Q2 type and Q-frame construction help identify the correct physical and electrical configuration for replacement work.
• A-B phasing is suitable for applications that require this phasing arrangement.
• The I-Line plug-on connection allows use with equipment designed for this installation style.
• The molded case construction is built to last when correctly installed and operated within its stated ratings.

Technical Specifications

• Part Number: Q221125AB
  
• Type: Q2
  
• Frame: Q-Frame
  
• Breaker Style: Molded Case Circuit Breaker
  
• Trip Operation: Thermal Magnetic
  
• Poles: 2
  
• Amperage: 125A
  
• AIC Rating & Voltage: 10k @ 120/240VAC
  
• Phasing: A-B
  
• Connection: I-Line, Plug-On
  
• Height: 7.88 in.
  
• Width: 3.0 in.
  
• Depth: 4.31 in.
  

Material Compliance and Certifications

• Certification and material-compliance details are not included in the available specifications for the Q221125AB. UL, RoHS, REACH, or other compliance status should therefore be verified from the breaker's markings or supporting manufacturer documentation rather than assumed.
• If your installation has specific code, listing, or certification requirements, confirm those requirements before the breaker is installed.

Where It Works Best

• The Q221125AB is best suited for replacement and maintenance work in compatible legacy electrical equipment that calls for a Q2, Q-frame molded-case breaker. It's especially relevant when the existing setup requires 125A, two poles, A-B phasing, an I-Line plug-on connection, and a 10k AIC rating at 120/240VAC.