THJK426250WL - 250Amp Circuit Breaker

THJK426250WL - 250 Amp Circuit Breaker

The THJK426250WL molded case circuit breaker is a 2-pole, 250-amp thermal-magnetic circuit breaker designed for use in your commercial and industrial power distribution systems that require dependable overcurrent and short-circuit protection. Built as part of the THJK4 Series, this breaker features a non-interchangeable thermal-magnetic trip unit with an internal common-trip mechanism, helping protect connected equipment and conductors by disconnecting power during overload or fault conditions. Configured in a cable-in/cable-out (lug-lug) arrangement, the THJK426250WL includes both line-side and load-side lugs, simplifying installation in compatible electrical distribution equipment. Its Q-Line design makes it suitable for applications requiring a high-amperage molded case circuit breaker with substantial interrupting capacity. Engineered for long service life in demanding environments, this breaker is built to last while providing the form, fit, and function needed for maintaining your existing electrical systems.

Key Features and Benefits

• 250-Amp Continuous Current Rating: 250-amp continuous current rating.
• 2-Pole Configuration: 2-pole configuration for two-phase or single-phase applications.
• THJK4 Series Design: THJK4 Series molded case circuit breaker.
• Thermal Magnetic Protection: The thermal magnetic trip unit provides overload and short-circuit protection.
• Non-Interchangeable Trip Design: Non-interchangeable trip design.
• Internal Common Trip Mechanism: Internal common trip mechanism for coordinated pole operation.
• Cable-In/Cable-Out Construction: Cable-in/cable-out (lug-lug) construction.
• Included Lugs: Includes both line-side and load-side lugs.
• HACR Rated: HACR rated for heating, air conditioning, and refrigeration applications.
• High Interrupting Capacity: High interrupting capacity for demanding electrical systems.
• Commercial and Industrial Applications: Designed for use in commercial and industrial power distribution equipment.
• Built for Durability: Built for long-term durability and dependable operation.
  

Technical Specifications

• Part Number: THJK426250WL
  
• Type: THJK4
  
• Poles: 2
  
• Amperage Rating: 250A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Interrupting Rating:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Connection Type: Cable-In/Cable-Out (Lug-Lug)
  
• Included Accessories: Line-Side and Load-Side Lugs
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: HACR Rated for heating, air conditioning, and refrigeration applications.
• Electrical Distribution Systems: Manufactured for installation in compatible electrical distribution systems.
• Industry Standards: Designed to meet applicable industry standards associated with molded case circuit breakers and overcurrent protection devices.
• Thermal Magnetic Protection Technology: Thermal magnetic protection technology provides a coordinated response to overload and fault conditions.
  

Where It Works Best

• The THJK426250WL is well-suited for commercial buildings, industrial facilities, manufacturing operations, mechanical equipment installations, HVAC systems, distribution panels, switchboards, and other power distribution applications requiring a 250-amp, 2-pole molded-case circuit breaker. It is commonly used where high interrupting ratings and reliable thermal-magnetic protection are required to maintain the safe operation of existing electrical infrastructure.