TJJ426125WL **Older Style** - 125Amp Circuit Breaker

TJJ426125WL **Older Style** - 125 Amp Circuit Breaker

Designed for dependable protection in your commercial and industrial electrical systems, the TJJ426125WL molded case circuit breaker delivers reliable overcurrent and short-circuit protection for equipment operating in demanding environments. This 2-pole, 125-amp breaker features a thermal magnetic trip unit with internal common trip functionality, helping you to provide consistent circuit interruption when fault conditions occur. Built with a cable-in/cable-out lug-lug configuration and supplied with both line- and load-side lugs, this breaker is well-suited for applications requiring a direct replacement that matches existing system layouts and specifications. The older style black face design makes this unit particularly useful for maintaining compatibility within legacy electrical distribution equipment where form, fit, and function matter. As part of the Q-Line family, the TJJ426125WL is HACR rated and engineered for long service life in properly maintained systems. Its non-interchangeable trip unit helps maintain fixed protection settings for applications where consistent amperage protection is required.

Key Features and Benefits

• 2-Pole 125 Amp Configuration: 2-pole molded case circuit breaker rated at 125 amps for commercial and industrial electrical distribution systems.
• Older Style Black Face Design: Older style black face design for compatibility with existing installations and legacy electrical distribution equipment.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit responds to overloads and short circuits to help provide reliable circuit interruption during fault conditions.
• Internal Common Trip Functionality: The internal common trip mechanism helps disconnect both poles simultaneously during fault conditions.
• Cable-In/Cable-Out Configuration: Cable-in/cable-out (lug-lug) configuration simplifies installation in compatible systems and includes both line-side and load-side lugs.
• HACR Rated Construction: HACR rated for heating, air conditioning, and refrigeration applications with Q-Line construction designed for long-term durability in commercial and industrial environments.
• Non-Interchangeable Trip Unit: Non-interchangeable trip unit maintains fixed protection characteristics where consistent amperage protection is required.
  

Technical Specifications

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

Material Compliance and Certifications

• Industry Standards: The TJJ426125WL circuit breaker is manufactured for use in commercial and industrial electrical distribution systems and is designed to meet applicable industry standards for molded case circuit breakers.
• HACR Rated: The unit is HACR rated for suitable HVAC and refrigeration applications. Proper installation and application should always be performed according to local electrical codes and manufacturer guidelines.
  

Where It Works Best

• The TJJ426125WL is commonly used in commercial electrical distribution panels, industrial control systems, HVAC and refrigeration equipment, manufacturing facilities, utility and infrastructure applications, retrofit and maintenance projects involving legacy electrical equipment, and facilities requiring a compatible replacement breaker with matching physical dimensions and electrical ratings. Its older style black face configuration makes it especially useful where maintaining consistency with existing switchgear or panelboard setups is important. Built to last and designed for dependable circuit protection, this breaker remains a practical solution for keeping established electrical systems operating safely and efficiently.