THJK626500 - 500Amp Circuit Breaker

THJK626500 - 500 Amp Circuit Breaker

The THJK626500 is a 500-amp, 2-pole molded-case circuit breaker designed for use in your commercial and industrial electrical distribution systems that require dependable overcurrent and short-circuit protection. As part of the THJK6 series, this breaker features a thermal-magnetic trip unit with a non-interchangeable trip design and an internal common trip, helping to protect your connected equipment and conductors from damage caused by overloads and fault conditions. Its bolt-on mounting configuration provides a secure installation, while the included load-side lugs help you to simplify field wiring. Built for demanding applications, this Q-Line circuit breaker is also HACR-rated, making it suitable for use in heating, air conditioning, and refrigeration equipment, where permitted by applicable codes and manufacturer specifications.

Engineered for long service life and consistent operation, the THJK626500 is commonly used in switchboards, panelboards, and distribution equipment where high-current protection is required. With interrupting ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, it is designed to meet the protection requirements of a wide range of power distribution applications while maintaining compatibility with equipment designed for Type THJK6 breakers.

Key Features and Benefits

• 500 Amp Continuous Current Rating: Provides 500 amps of continuous current capacity for high-current electrical distribution applications.
• 2-Pole Configuration: Designed for the protection of two energized conductors.
• Type THJK6 Molded Case Circuit Breaker: Built as a Type THJK6 molded case circuit breaker for compatibility with equipment designed for this breaker type.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit responds to both overload and short-circuit conditions.
• Non-Interchangeable Trip Design: Features a non-interchangeable trip design.
• Internal Common Trip Mechanism: Includes an internal common trip mechanism.
• Bolt-On Mounting: Bolt-on mounting provides secure installation.
• Includes Load-Side Lugs: Load-side lugs are included to help simplify field wiring.
• HACR Rated: HACR rated for qualifying HVAC applications.
• Q-Line Series Construction: Manufactured as part of the Q-Line series.
• Commercial and Industrial Applications: Designed for commercial and industrial power distribution systems.
• Long-Term Reliability: Built for long-term durability and dependable operation.
  

Technical Specifications

• Part Number: THJK626500
  
• Type: THJK6
  
• Circuit Breaker Category: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage Rating: 500A
  
• Trip Unit: Thermal Magnetic
  
• Trip Design: Non-Interchangeable
  
• Trip Style: Internal Common Trip
  
• Mounting: Bolt-On
  
• Included Accessories: Load-Side Lugs
  
• HACR Rated: Yes
  
• Interrupting Rating: 25kA @ 600VAC
  
• Interrupting Rating: 35kA @ 480VAC
  
• Interrupting Rating: 65kA @ 240VAC
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: HACR Rated.
• Industry Standards: Manufactured and tested to applicable industry standards for molded case circuit breakers.
• Application Compliance: Designed for use in electrical distribution systems when installed in accordance with applicable codes, equipment ratings, and manufacturer requirements.
  

Where It Works Best

• The THJK626500 is well-suited for commercial and industrial facilities that require high-amperage branch or feeder circuit protection. Typical applications include electrical distribution equipment, switchboards, panelboards, motor loads, HVAC systems, manufacturing facilities, institutional buildings, and other power distribution environments that require a 500-amp, 2-pole bolt-on circuit breaker. It is particularly useful when maintaining or replacing existing equipment designed for compatibility with Type THJK6 Q-Line circuit breakers, helping ensure proper form, fit, and function within the original system.