TJK426400 - 400Amp Circuit Breaker

TJK426400 - 400 Amp Circuit Breaker

The GE TJK426400 molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems where higher amperage capacity and consistent trip response are required. Built as part of the trusted Q-Line family, this 2-pole breaker features a fixed thermal magnetic trip unit with internal common trip functionality to help you protect connected equipment from overloads and short circuits. Its bolt-on mounting design allows for secure installation in compatible panelboards and switchgear applications, while the included load-side lugs help simplify field connections. With HACR rating and multiple interrupting capacities at common voltage classes, the TJK426400 is well suited for demanding HVAC, power distribution, and motor protection applications. Designed with long-term serviceability in mind, this breaker offers the form, fit, and function needed for maintaining existing electrical systems and infrastructure.

Key Features and Benefits

• 400 Amp, 2-Pole Configuration: Designed for high-capacity electrical distribution applications requiring dependable two-pole protection.
• Thermal Magnetic Trip Unit: Provides combined overload and short-circuit protection using a non-interchangeable fixed trip design.
• Q-Line Bolt-On Construction: Secure bolt-on mounting helps maintain stable electrical connections in commercial and industrial environments.
• Internal Common Trip Mechanism: Both poles trip simultaneously during fault conditions for added circuit protection and code compliance.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Includes Load-Side Lugs: Helps streamline installation and wiring compatibility in the field.
• Built for Long-Term Use: Constructed for demanding electrical systems where durability and reliable operation are important.
  

Technical Specifications

• Manufacturer Series: Q-Line
  
• Part Number: TJK426400
  
• Type: TJK4
  
• Product Type: Molded Case Circuit Breaker
  
• Mounting Style: Bolt-On
  
• Poles: 2
  
• Amperage Rating: 400A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Non-Interchangeable
  
• Common Trip: Internal Common Trip
  
• A.I.C. Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Height: 10.13 in
  
• Width: 8.25 in
  
• Depth: 3.81 in
  

Material Compliance and Certifications

• Industry Standards: The GE TJK426400 circuit breaker is manufactured for use in commercial and industrial power distribution systems and is designed to meet applicable industry standards associated with molded case circuit breakers.
• HACR Rating: The HACR rating supports use in HVAC-related applications where approved circuit protection is required.
• Installation Guidance: Proper installation and application should always follow local electrical codes and manufacturer guidelines.
  

Where It Works Best

• The TJK426400 is commonly used in commercial buildings and facilities, industrial distribution panels, HVAC and refrigeration systems, manufacturing equipment applications, electrical switchboards and panelboards, motor protection and feeder circuits, and existing GE Q-Line electrical systems requiring compatible replacement breakers. Its combination of high amperage capacity, bolt-on installation, and thermal magnetic protection makes it a practical solution for maintaining and servicing established electrical infrastructure.