TJJ426125WL - 125Amp Circuit Breaker

TJJ426125WL - 125 Amp Circuit Breaker

The TJJ426125WL molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems where consistent performance and equipment compatibility matter. Built as part of the Q-Line family, this 2-pole, 125-amp breaker features a thermal-magnetic trip unit with an internal common trip, helping you protect electrical systems from overloads and short circuits while maintaining stable operation in demanding environments. Its cable-in/cable-out lug-lug configuration includes both line-side and load-side lugs for straightforward installation and secure conductor termination.

With interrupting ratings up to 22k A.I.C. at 600VAC, this breaker is suited for applications requiring reliable fault protection across multiple voltage systems. The compact, molded-case design supports long service life in switchboards, panelboards, motor control equipment, and other power distribution assemblies. HACR rating compatibility also makes it suitable for heating, air conditioning, and refrigeration applications where dependable overcurrent protection is essential. Built to last and engineered for compatibility with form, fit, and function, the TJJ426125WL is a practical solution for maintaining or servicing existing electrical systems.

Key Features and Benefits

• 125 Amp Continuous Current Rating: Designed to provide reliable overcurrent protection for commercial and industrial applications.
• 2-Pole Configuration: Supports protection for two-phase electrical circuits with internal common trip functionality.
• Thermal Magnetic Trip Unit: Combines thermal overload protection with magnetic short-circuit response for balanced circuit protection.
• Q-Line Molded Case Design: Compatible with existing electrical distribution systems using Type TJJ breakers.
• Cable-In/Cable-Out (Lug-Lug) Construction: Includes both line-side and load-side lugs for secure conductor connections and simplified installation.
• HACR Rated: Suitable for HVAC, refrigeration, and air conditioning equipment applications.
• High Interrupting Capacity: Rated for fault interruption at multiple voltage levels to help protect equipment during high-current fault conditions.
• Compact Footprint: Space-conscious dimensions allow easier integration into existing panel and switchgear layouts.
  

Technical Specifications

• Part Number: TJJ426125WL
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Type: TJJ
  
• Frame Style: Q-Line
  
• Poles: 2
  
• Amperes: 125A
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Trip Function: Internal Common Trip
  
• Configuration: Cable-In/Cable-Out (Lug-Lug)
  
• Included Accessories: Line and Load-Side Lugs
  
• A.I.C. Rating @ 600VAC: 22k
  
• A.I.C. Rating @ 480VAC: 30k
  
• A.I.C. Rating @ 240VAC: 42k
  
• HACR Rated: Yes
  
• Height: 10.13 in
  
• Width: 8.25 in
  
• Depth: 3.81 in
  

Material Compliance and Certifications

• HACR Rated: HACR Rated for heating, air conditioning, and refrigeration applications.
• Commercial and Industrial Use: Designed for use in commercial and industrial electrical distribution systems.
• Molded Case Construction: Molded case construction intended for long-term durability in demanding operating environments.
• Industry Standards: Manufactured to meet applicable industry standards for molded case circuit breakers.
  

Where It Works Best

• The TJJ426125WL is commonly used in commercial buildings, industrial facilities, HVAC and refrigeration systems, power distribution equipment, panelboards and switchboards, manufacturing operations, electrical maintenance and retrofit projects, and existing systems requiring compatible Type TJJ circuit breakers. Its combination of high interrupting capacity, thermal magnetic protection, and lug-lug connectivity makes it well-suited for facilities that rely on dependable overcurrent protection and compatibility with established electrical infrastructure.