TJJ436400WL - 400Amp Circuit Breaker

TJJ436400WL - 400 Amp Circuit Breaker

The TJJ436400WL molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems where higher amperage capacity and consistent overcurrent protection are required. Built as part of the trusted Q-Line family, this 3-pole, 400-amp breaker features a thermal magnetic trip unit with internal common trip, helping you to protect electrical equipment and connected systems from overloads and short circuits. Its cable-in/cable-out (lug-lug) configuration, along with included line and load-side lugs, supports straightforward installation and compatibility within existing power distribution setups. Designed for long-term service in demanding environments, this breaker is commonly used in switchboards, panelboards, and industrial control applications where reliable protection and fit compatibility matter.

Key Features and Benefits

• 400 Amp Molded Case Circuit Breaker: Designed for commercial and industrial power distribution applications requiring dependable circuit protection.
• 3-Pole Configuration: Provides protection for three-phase electrical systems commonly used in industrial and commercial facilities.
• Thermal Magnetic Trip Unit: Helps protect electrical systems against overloads and short circuits through dependable overcurrent protection.
• Internal Common Trip Mechanism: Helps disconnect all poles simultaneously during fault conditions to support system protection.
• Q-Line Compatibility: Supports compatibility with a variety of existing electrical distribution systems and equipment.
• Cable-In/Cable-Out Lug-Lug Configuration: Simplifies conductor termination and installation within existing power distribution setups.
• Includes Line and Load-Side Lugs: Provides installation convenience with included connection hardware.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration applications requiring circuit protection.
• Built for Long Service Life: Designed for dependable operation in demanding commercial and industrial environments.
• Compact Footprint: Helps maximize available panel and equipment space where installation space is limited.
  

Technical Specifications

• Part Number: TJJ436400WL
  
• Type: TJJ
  
• Product Category: Molded Case Circuit Breaker
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Poles: 3
  
• Amperage: 400A
  
• A.I.C. Rating:
  • 22k @ 600VAC
  • 30k @ 480VAC
  • 42k @ 240VAC
• Configuration: Cable-in/Cable-out (Lug-Lug)
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Included Accessories: Line and Load-Side Lugs
  
• Series: Q-Line
  

Material Compliance and Certifications

• HACR Rated: Approved for use in heating, air conditioning, and refrigeration applications requiring reliable circuit protection.
• Commercial and Industrial Use: Designed for use in commercial and industrial electrical distribution systems.
• Industry Standards: Manufactured to meet applicable molded case circuit breaker industry standards for safety and performance.
• Thermal Magnetic Protection: Helps support the safe operation of connected electrical equipment through overload and short circuit protection.
  

Where It Works Best

• The TJJ436400WL is well-suited for use in commercial buildings, industrial facilities, manufacturing environments, distribution panels and switchboards, HVAC and refrigeration systems, motor control and feeder applications, and electrical infrastructure requiring 400A three-phase circuit protection. Its combination of thermal magnetic protection, lug-lug connectivity, and Q-Line compatibility makes it a practical replacement solution for maintaining and servicing existing electrical systems where matching form, fit, and function are important.