THJK636450WL - 450Amp Circuit Breaker

THJK636450WL - 450 Amp Circuit Breaker

The THJK636450WL is a 3-pole, 450-amp molded case circuit breaker designed for use in your commercial and industrial power distribution systems. Built as part of the THJK6 Series, this breaker provides thermal-magnetic overcurrent protection and features an internal common-trip mechanism that opens all poles when a fault condition is detected.

This model uses a lug-to-lug (cable-in/cable-out) connection design and comes equipped with both line-side and load-side lugs. With interrupting capacities of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, it is suitable for a wide range of three-phase electrical applications requiring dependable circuit protection.

The THJK636450WL is commonly found in distribution equipment, industrial facilities, commercial buildings, and HVAC-related installations. Its HACR rating allows it to be used in qualifying heating, air conditioning, and refrigeration applications. Built for long-term service, this breaker remains a practical choice when maintaining or replacing equipment in existing THJK6 installations.

Key Features and Benefits

• 450 amp current rating: 450 amp current rating.
• Three-pole configuration for three-phase systems: Three-pole configuration for three-phase systems.
• THJK6 Series molded case circuit breaker: THJK6 Series molded case circuit breaker.
• Thermal magnetic trip unit: Thermal magnetic trip unit.
• Internal common trip design: Internal common trip design.
• Cable-in/cable-out (lug-lug) connections: Cable-in/cable-out (lug-lug) connections.
• Includes line-side and load-side lugs: Includes line-side and load-side lugs.
• HACR rated: HACR rated.
• Designed for commercial and industrial electrical distribution systems: Designed for commercial and industrial electrical distribution systems.
• Suitable as a form, fit, and functional replacement in compatible equipment: Suitable as a form, fit, and functional replacement in compatible equipment.
  

Technical Specifications

• Part Number: THJK636450WL
  
• Series: THJK6
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Poles: 3
  
• Amperage: 450A
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Connection Type: Lug-Lug (Cable-In/Cable-Out)
  
• Included Lugs: Line and Load Side
  
• Interrupting Rating: 25kA @ 600VAC
  
• Interrupting Rating: 35kA @ 480VAC
  
• Interrupting Rating: 65kA @ 240VAC
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: HACR Rated.
• Thermal magnetic overcurrent protection: Thermal magnetic overcurrent protection.
• Manufactured for use in accordance with applicable industry standards for molded case circuit breakers: Manufactured for use in accordance with applicable industry standards for molded case circuit breakers.
• Rated for operation within the specified voltage and interrupting capacities: Rated for operation within the specified voltage and interrupting capacities.
  

Where It Works Best

• The THJK636450WL is often used in switchboards, panelboards, distribution equipment, manufacturing facilities, commercial buildings, and HVAC systems. It is particularly useful when replacing an existing THJK6 breaker where matching electrical ratings, dimensions, and connection style are important to maintaining the original system design.