TJK626450 - 450Amp Circuit Breaker

TJK626450 - 450 Amp Circuit Breaker

When your electrical system depends on steady, reliable circuit protection, the TJK626450 molded case circuit breaker is built to handle the job. Designed as part of the trusted Q-Line series, this 2-pole, 450-amp breaker is commonly used in commercial and industrial power distribution systems where high-capacity protection matters. Its thermal magnetic trip unit responds to both overloads and short circuits, helping protect connected equipment from electrical damage while keeping operations running safely and efficiently.

The bolt-on design allows for secure installation in compatible panelboards and switchgear, making the TJK626450 a practical choice for maintenance teams, electrical contractors, and facility managers working with existing TJK6 systems. With internal common trip functionality, both poles disconnect simultaneously during a fault condition, helping provide coordinated protection where it counts. The included load-side lugs also help simplify installation and conductor connections in the field.

Because this breaker is HACR-rated, it’s especially well-suited for HVAC, refrigeration, and heavy mechanical equipment applications. Whether it’s protecting large motors, commercial cooling systems, manufacturing equipment, or facility distribution panels, the TJK626450 is built for dependable long-term service in demanding environments. It’s a solid, fit-and-functional replacement option for compatible legacy electrical systems where maintaining proper equipment compatibility is important.

Key Features and Benefits

• 450 Amp Molded Case Circuit Breaker: Designed for commercial and industrial electrical systems where high-capacity overcurrent protection is required.
• 2-Pole Configuration: Suitable for compatible multi-phase electrical applications requiring coordinated protection.
• Thermal Magnetic Trip Unit: Helps protect connected systems against overloads and short circuits through responsive trip protection.
• Internal Common Trip Mechanism: Disconnects both poles simultaneously during fault conditions for coordinated electrical safety.
• Bolt-On Mounting Design: Supports secure installation in approved panelboards and switchgear assemblies.
• HACR Rated: Approved for use in heating, air conditioning, and refrigeration system applications.
• Includes Load-Side Lugs: Helps simplify field wiring and conductor terminations during installation.
• Built for Long-Term Operation: Designed for dependable service in demanding commercial and industrial electrical environments.
• Q-Line and TJK6 Compatibility: Intended for use in compatible existing TJK6 and Q-Line electrical systems.
  

Technical Specifications

• Part Number: TJK626450
  
• Series: TJK6
  
• Product Type: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage Rating: 450A
  
• Voltage Ratings: 600VAC / 480VAC / 240VAC
  
• A.I.C. Rating: 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  
• Mounting Type: Bolt-On
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Dimensions:
  • Height: 10.13"
  • Width: 8.25"
  • Depth: 3.81"
• Product Line: Q-Line
  
• Included: Load-Side Lugs
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• HACR Rated: The TJK626450 circuit breaker is HACR rated for use in heating, ventilation, air conditioning, and refrigeration systems.
• Commercial and Industrial Use: Its molded-case construction is designed for use in commercial and industrial electrical distribution environments that require dependable overcurrent protection.
• Installation Requirements: Installation should always be completed by qualified personnel in accordance with applicable electrical codes and manufacturer guidelines.
  

Where It Works Best

• The TJK626450 is commonly used in commercial building electrical distribution systems, industrial facilities and manufacturing equipment, HVAC and refrigeration equipment protection, mechanical systems with high electrical demand, distribution panels and switchboards, and replacement projects involving compatible TJK6 breaker systems. For facilities that rely on consistent electrical protection and compatibility with existing equipment, the TJK626450 offers a dependable solution that keeps systems operating smoothly for years to come.