TJK426400WL - 400Amp Circuit Breaker

TJK426400WL - 400 Amp Circuit Breaker

The TJK426400WL molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems where higher amperage capacity and consistent operation are essential. Built as part of the trusted TJK4 Q-Line family, this 2-pole, 400-amp breaker features a thermal magnetic trip unit with internal common trip functionality to help you protect connected equipment from overloads and short circuits. Its cable-in/cable-out lug-lug configuration simplifies installation in compatible systems, while the included line- and load-side lugs help support secure conductor connections. With strong interrupting ratings up to 600VAC and HACR certification, the TJK426400WL is well-suited for HVAC applications, distribution panels, switchboards, and other demanding power distribution environments. Built to last and engineered for form, fit, and functional compatibility in existing systems, this breaker remains a practical solution for maintaining and servicing established electrical infrastructure.

Key Features and Benefits

• 400 Amp Current Rating: 400 Amp current rating for high-capacity power distribution applications.
• 2-Pole Configuration: 2-pole configuration designed for compatible commercial and industrial systems.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit helps protect against overloads and short circuits.
• Internal Common Trip: Internal common trip mechanism supports coordinated breaker operation.
• Q-Line Type TJK4 Construction: Q-Line Type TJK4 molded case circuit breaker construction.
• Cable-In/Cable-Out Configuration: Cable-in/cable-out (lug-lug) connection style for straightforward installation.
• Included Lugs: Includes both line-side and load-side lugs.
• HACR Rated: HACR rated for use in heating, air conditioning, and refrigeration applications.
• Existing Equipment Compatibility: Suitable for maintaining and servicing existing electrical distribution equipment.
• Compact Molded Case Design: Compact molded case design helps maximize panel space efficiency.
  

Technical Specifications

• Part Number: TJK426400WL
  
• Type: TJK4
  
• Product Category: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperes: 400A
  
• Voltage & A.I.C. Ratings: 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Trip Function: Internal Common Trip
  
• Connection Type: Cable-in/Cable-out (Lug-Lug)
  
• Certifications: HACR Rated
  
• Included Accessories: Line and Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Certification: The TJK426400WL circuit breaker is HACR rated, making it suitable for heating, air conditioning, and refrigeration system applications where compatible equipment protection is required.
• Durable Molded Case Construction: Its molded case construction is designed for long-term durability in commercial and industrial environments.
• Installation Requirements: This breaker is intended for use in appropriately rated electrical systems and should be installed in accordance with applicable electrical codes and manufacturer specifications.
  

Where It Works Best

• Commercial electrical distribution systems
• Industrial control panels and switchgear
• HVAC and refrigeration equipment installations
• Manufacturing facilities
• Distribution panels and power management systems
• Service and maintenance applications involving existing Q-Line compatible equipment
• Facilities requiring dependable 400A circuit protection with high interrupting capacity