TJJ426400 **Older Style** - 400Amp Circuit Breaker

TJJ426400 **Older Style** - 400 Amp Circuit Breaker

The TJJ426400 Older Style Black Face molded case circuit breaker is designed for dependable protection in your commercial and industrial electrical distribution systems, where maintaining compatibility with existing equipment is essential. Built as part of the GE Q-Line series, this 2-pole, 400-amp breaker features a non-interchangeable thermal magnetic trip unit with internal common trip functionality for consistent overcurrent and short-circuit protection. Its bolt-on mounting configuration provides a secure connection in compatible panelboards and switchgear applications, while the included load-side lugs simplify installation and conductor termination. HACR-rated for heating, air conditioning, and refrigeration applications, the TJJ426400 is built to last and remains a practical solution for maintaining legacy electrical systems operating at up to 600VAC.

Key Features and Benefits

• 400A Molded Case Circuit Breaker: Designed for commercial and industrial power distribution applications requiring dependable circuit protection.
• Older Style Black Face Configuration: Provides form, fit, and functional compatibility in existing systems and legacy equipment installations.
• GE Q-Line Series Design: Features a bolt-on mounting configuration for secure installation in compatible panelboards and switchgear applications.
• Thermal Magnetic Protection: The non-interchangeable thermal magnetic trip unit protects against overloads and short circuits for consistent system protection.
• Internal Common Trip Functionality: Disconnects both poles simultaneously when required for added protection and operational reliability.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Load-Side Lugs Included: Simplifies installation and conductor termination for added convenience.
• Built for Demanding Environments: Designed for long-term service in commercial and industrial electrical systems requiring Type TJJ breakers.
  

Technical Specifications

• Part Number: TJJ426400
  
• Type: TJJ
  
• Series: Q-Line
  
• Breaker Style: Older Style Black Face
  
• Poles: 2
  
• Amperage Rating: 400A
  
• Voltage Ratings:
  • 22k A.I.C. @ 600VAC
  • 30k A.I.C. @ 480VAC
  • 42k A.I.C. @ 240VAC
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Mounting Type: Bolt-On
  
• Trip Function: Internal Common Trip
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• Commercial and Industrial Application Compliance: The TJJ426400 circuit breaker is manufactured for use in applicable commercial and industrial electrical systems and is HACR rated for heating and cooling applications.
• UL-Listed Equipment Compatibility: It is designed to meet the operational requirements of molded case circuit breakers used in UL-listed electrical distribution equipment when installed in compatible systems and in accordance with applicable electrical codes and manufacturer specifications.
  

Where It Works Best

• The TJJ426400 is commonly used in commercial facilities, industrial buildings, manufacturing operations, and large-scale HVAC systems where a 2-pole 400A breaker is required for existing GE Q-Line equipment. It is especially well-suited for maintenance, repair, and replacement projects involving legacy electrical distribution systems that require the older-style black-face configuration for proper compatibility and installation fitment.