TJK426400WL **Older Style** - 400Amp Circuit Breaker

TJK426400WL **Older Style** - 400 Amp Circuit Breaker

The TJK426400WL molded case circuit breaker is a 2-pole, 400-amp breaker designed for your dependable protection in commercial and industrial electrical distribution systems. Built as part of the trusted Q-Line family, this breaker features a thermal magnetic trip unit with internal common trip functionality to help you protect connected equipment and branch circuits from overloads and short circuits. Its cable-in/cable-out lug-lug configuration allows for straightforward installation in compatible legacy systems where maintaining original form and fit is important.

This older style black face Type TJK4 breaker is commonly used in switchboards, panelboards, and power distribution applications requiring high interrupting capacity and reliable overcurrent protection. With included line and load-side lugs, the TJK426400WL is configured for efficient field installation and service replacement needs. Designed for long-term durability, this molded case circuit breaker continues to serve demanding electrical environments where consistent operation and compatibility matter most.

Key Features and Benefits

• 400 Amp molded case circuit breaker: Designed for commercial and industrial power distribution.
• 2-pole configuration: For compatible electrical systems.
• Older style black face design: For matching existing equipment layouts.
• Thermal magnetic trip unit: Provides overload and short-circuit protection.
• Internal common trip mechanism: Enhances circuit safety.
• Q-Line construction: For use in compatible legacy installations.
• Cable-in/Cable-out (Lug-Lug) connection style: Simplifies installation.
• Includes line and load-side lugs
• HACR rated: For heating, air conditioning, and refrigeration applications.
• Built to last: In demanding electrical environments.
  

Technical Specifications

• Part Number: TJK426400WL
  
• Type: TJK4
  
• Product Style: Older Style Black Face
  
• Poles: 2
  
• Amperes: 400A
  
• Voltage & A.I.C. Rating:
  • 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)
  
• Line/Load Lugs: Included
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: The TJK426400WL circuit breaker is HACR rated and designed for use in compatible commercial and industrial electrical systems requiring molded case circuit protection.
• Industry Standards: It is manufactured for compliance with applicable industry electrical standards associated with its original design and intended application.
  

Where It Works Best

• Commercial buildings
• Industrial facilities
• Distribution panels
• Switchboards
• Mechanical equipment protection
• HVAC and refrigeration systems
• Maintenance and replacement projects requiring compatible legacy circuit breakers
• Electrical systems requiring high interrupting capacity and dependable thermal magnetic protection