THJK636450 - 450Amp Circuit Breaker

THJK636450 - 450 Amp Circuit Breaker

The THJK636450 is a 3-pole, 450-amp molded-case circuit breaker designed for use in your commercial, industrial, and institutional power distribution systems that require dependable overcurrent and short-circuit protection. As part of the THJK6 Q-Line family, this bolt-on circuit breaker features a non-interchangeable thermal-magnetic trip unit with an internal common trip, helping protect your connected equipment and conductors by responding to both overload and fault conditions. Built to last and engineered for compatibility within applicable Q-Line panelboard and switchboard installations, the THJK636450 includes load-side lugs for streamlined installation and termination. Its combination of high current capacity and multiple interrupting ratings makes it well-suited for demanding electrical distribution applications where maintaining system protection is essential.

Key Features and Benefits

• 450A Continuous Current Rating: 450A continuous current rating for high-capacity electrical distribution applications.
• 3-Pole Configuration: 3-pole configuration for three-phase power systems.
• THJK6 Series Design: THJK6 series molded case circuit breaker design.
• Bolt-On Mounting: Bolt-on mounting for secure installation in compatible equipment.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit protects against overloads and short circuits.
• Non-Interchangeable Configuration: Non-interchangeable trip unit configuration.
• Internal Common Trip: The internal common trip mechanism opens all poles simultaneously during fault conditions.
• HACR Rated: HACR rated for use in heating, air conditioning, and refrigeration applications where permitted by code.
• Load-Side Lugs Included: Includes load-side lugs for convenient conductor termination.
• Built for Long Service Life: Built for long service life in commercial and industrial electrical systems.
  

Technical Specifications

• Part Number: THJK636450
  
• Type: THJK6
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Product Family: Q-Line
  
• Mounting Style: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 450A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Non-Interchangeable
  
• Common Trip: Internal Common Trip
  
• Interrupting Ratings:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Included Accessories: Load-Side Lugs
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• HACR Rated: HACR Rated.
• Low-Voltage AC Power Distribution Systems: Designed and manufactured for use in applicable low-voltage AC power distribution systems.
• Thermal Magnetic Protection: Thermal magnetic overcurrent protection design.
• Installation Requirements: Suitable for installation in compatible equipment when applied in accordance with applicable electrical codes, standards, and manufacturer requirements.
  

Where It Works Best

• The THJK636450 is commonly used in commercial buildings, manufacturing facilities, distribution centers, institutional campuses, and other large-scale electrical systems requiring a 450-amp, 3-pole circuit breaker. It is particularly well-suited for main distribution sections, large feeder circuits, motor loads, HVAC equipment, and other three-phase applications where dependable overcurrent protection and compatibility with existing Q-Line equipment are important considerations. Its bolt-on design and included load-side lugs make it a practical form-fit-and-function replacement for compatible installations that require the same electrical ratings and configuration.