TJJ426125 - 125Amp Circuit Breaker

TJJ426125 - 125 Amp Circuit Breaker

The TJJ426125 molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems that require a 2-pole, 125-amp configuration. Built as part of the trusted Q-Line family, this breaker features a thermal-magnetic trip unit with internal common trip functionality, which helps you to protect connected equipment and electrical circuits from overloads and short circuits. Its bolt-on mounting design supports secure installation in compatible panelboards and switchgear applications, while the included load-side lugs simplify field connections.

Engineered for long service life in demanding environments, the TJJ426125 is HACR rated and suitable for applications involving heating, air conditioning, and refrigeration equipment. With interrupting capacities rated up to 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, this breaker is built to last while maintaining the form, fit, and function needed for existing electrical systems and replacement projects. The non-interchangeable trip design helps maintain consistent protection characteristics in installations where specified breaker ratings must remain fixed.

Key Features and Benefits

• 125 amp molded case circuit breaker for commercial and industrial applications: Designed for dependable overcurrent protection in demanding electrical distribution systems.
• 2-pole configuration for reliable multi-phase circuit protection: Supports installations requiring coordinated multi-phase protection.
• Thermal magnetic trip unit: Responds to both overload and short-circuit conditions to help protect connected equipment and electrical circuits.
• Internal common trip mechanism: Helps disconnect all poles simultaneously during fault events for enhanced protection.
• Bolt-on mounting style: Supports secure installation in compatible electrical assemblies.
• Includes load-side lugs: Simplifies field wiring connections during installation and maintenance.
• HACR rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Q-Line compatibility: Supports use in designated legacy electrical distribution systems.
• Non-interchangeable trip unit: Maintains fixed protection settings where specified breaker ratings must remain unchanged.
• Built for durability: Engineered for long-term performance in demanding operating environments.
  

Technical Specifications

• Part Number: TJJ426125
  
• Type: TJJ
  
• Product Family: Q-Line
  
• Poles: 2
  
• Amperage: 125A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Mounting Type: Bolt-On
  
• A.I.C. Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• HACR Rated: Yes
  
• Lugs: Includes Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• Industry Applications: The TJJ426125 circuit breaker is designed for use in electrical distribution systems that require compliant overcurrent protection devices in commercial and industrial environments.
• HACR Rating: Its HACR rating supports use in approved HVAC-related applications, and the breaker is designed to meet applicable industry standards for molded-case circuit breakers and electrical safety requirements.
  

Where It Works Best

• The TJJ426125 is well-suited for use in commercial buildings and tenant spaces, industrial control panels and distribution systems, HVAC and refrigeration equipment circuits, manufacturing facilities, electrical retrofit and maintenance projects, existing Q-Line compatible panelboards and switchgear systems, and applications requiring fixed 125 amp overcurrent protection in legacy installations.