THJK426350WL - 350Amp Circuit Breaker

THJK426350WL - 350 Amp Circuit Breaker

The THJK426350WL is a 350 Amp, 2-pole molded case circuit breaker designed for use in your commercial and industrial power distribution systems requiring dependable overcurrent and short-circuit protection. As part of the THJK4 Series, this circuit breaker features a thermal magnetic trip unit with internal common trip functionality, helping to protect your electrical equipment and conductors from potentially damaging fault conditions. Its cable-in/cable-out (lug-lug) configuration includes both line-side and load-side lugs, simplifying installation in compatible switchboards, panelboards, and distribution equipment.

Built for long service life in demanding electrical environments, the THJK426350WL provides high interrupting capacity ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, making it suitable for a wide range of power distribution applications. The non-interchangeable trip unit design helps maintain consistent protection settings, while the HACR rating supports use in heating, air conditioning, and refrigeration-related systems where permitted by applicable codes and equipment requirements.

Key Features and Benefits

• 350 Amp continuous current rating
• 2-pole configuration for compatible AC power distribution systems
• THJK4 Series molded case circuit breaker design
• Thermal magnetic trip unit provides overload and short-circuit protection
• Internal common trip mechanism helps ensure coordinated pole operation
• Cable-in/cable-out (lug-lug) construction
• Includes both line-side and load-side lugs
• HACR rated for qualifying HVAC and refrigeration applications
• Non-interchangeable trip unit maintains fixed protection characteristics
• Designed for long-term service in commercial and industrial electrical systems
• Suitable as a form, fit, and function replacement where specifications match

Technical Specifications

• Part Number: THJK426350WL
  
• Series: THJK4
  
• Type: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage Rating: 350 Amps
  
• Trip Unit: Thermal Magnetic
  
• Trip Type: Internal Common Trip
  
• Configuration: Cable-In/Cable-Out (Lug-Lug)
  
• Included Accessories: Line and Load-Side Lugs
  
• A.I.C. Rating @ 240VAC: 65kA
  
• A.I.C. Rating @ 480VAC: 35kA
  
• A.I.C. Rating @ 600VAC: 25kA
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR (Heating, Air Conditioning, and Refrigeration) Rated
• Manufactured for use in electrical distribution applications requiring overcurrent protection
• Designed and rated in accordance with applicable industry standards for molded case circuit breakers
• Verify installation requirements and local code compliance before application

Where It Works Best

• The THJK426350WL is well-suited for commercial buildings, industrial facilities, manufacturing operations, power distribution equipment, and HVAC-related electrical systems that require a 350A, 2-pole molded case circuit breaker. Its high interrupting ratings make it appropriate for installations where available fault current demands a breaker with substantial short-circuit protection capability. This breaker is commonly used in switchboards, panelboards, and other distribution equipment where matching electrical ratings, physical dimensions, and connection configurations are essential for proper system integration.