QDA221251 - 125 Amp Circuit Breaker

QDA221251 - 125 Amp Circuit Breaker

The QDA221251 circuit breaker is a 125 amp, 2-pole molded case circuit breaker designed for dependable circuit protection in commercial and industrial power distribution systems. Built on the PowerPact Q-Frame platform, this breaker features a thermal magnetic trip unit that responds to both overloads and short circuits, helping protect conductors and connected equipment from damage. With a 25kA interrupting rating at 240VAC, it is engineered for applications where higher available fault current demands a breaker with the appropriate A.I.C. capacity. Its I-Line, plug-on mounting configuration allows for secure installation in compatible panelboards and switchboards, making it a practical form, fit, and functional replacement for existing Q-Frame installations. Designed for durability and consistent operation, this breaker is built to last in demanding electrical environments.

Key Features and Benefits

• 125 Amp Continuous Current Rating: Supports branch or feeder circuit protection in 240VAC systems.
• 2-Pole Configuration (A-B Phase): Designed for use on single-phase systems or multi-phase applications requiring two poles.
• 25kA @ 240VAC Interrupting Rating: Suitable for systems with higher available fault currents within this rating.
• Thermal Magnetic Trip Unit: Provides inverse-time overload protection and instantaneous short-circuit protection.
• PowerPact Q-Frame Design: Ensures compatibility with existing Q-Frame panelboards and switchgear.
• I-Line, Plug-On Mounting: Enables proper connection in designated I-Line distribution equipment.
• Molded Case Construction: Compact housing designed for dependable protection and long service life.
  

Technical Specifications

• Part Number: QDA221251
  
• Manufacturer Series: PowerPact Q-Frame
  
• Poles: 2
  
• Amperage Rating: 125A
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity (A.I.C.): 25kA @ 240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting Type: I-Line, Plug-On
  
• Phase Configuration: A-B Phase
  
• Breaker Type: Molded Case Circuit Breaker (MCCB)
  
• Approximate Shipping Weight: 3.0 lbs
  
• Approximate Height: 7.88 in.
  

Material Compliance and Certifications

• Industry Standards: The QDA221251 circuit breaker is manufactured in accordance with applicable industry standards for molded case circuit breakers.
• Certifications: It is designed to meet UL and other relevant electrical safety requirements when installed in approved equipment and used within its rated specifications. Proper installation by qualified personnel ensures compliance with national and local electrical codes.
  

Where It Works Best

• Commercial buildings requiring 125A branch or feeder circuit protection
• Industrial facilities with 240VAC distribution systems
• I-Line panelboards and switchboards designed for PowerPact Q-Frame breakers
• Replacement projects where maintaining existing Q-Frame compatibility is essential
• Applications requiring a 25kA interrupting rating at 240VAC