THJK436350WL - 350Amp Circuit Breaker

THJK436350WL - 350 Amp Circuit Breaker

The THJK436350WL is a 350-amp, 3-pole molded case circuit breaker designed for use in your commercial and industrial power distribution systems where dependable circuit protection is essential. As part of the THJK4 Q-Line series, this breaker features a thermal magnetic trip unit with internal common trip functionality, helping to protect your electrical equipment and conductors from overloads and short circuits. Its cable-in/cable-out (lug-lug) configuration includes both line-side and load-side lugs, making installation straightforward in compatible switchboards, panelboards, and distribution equipment.

Built for long service life in demanding electrical environments, the THJK436350WL combines a compact footprint with substantial interrupting capacity. The non-interchangeable trip unit provides consistent protection characteristics, while its HACR rating supports use in heating, air conditioning, and refrigeration applications. Whether used as a replacement breaker or for maintaining existing electrical infrastructure, this circuit breaker is designed to provide the form, fit, and function required for compatible systems.

Key Features and Benefits

• 350 Amp Current Rating: 350 Amp current rating for high-capacity power distribution applications.
• 3-Pole Design: 3-pole design suitable for three-phase electrical systems.
• THJK4 Q-Line Construction: THJK4 Q-Line molded case circuit breaker.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit provides protection against overloads and short circuits.
• Internal Common Trip Mechanism: The internal common trip mechanism helps ensure all poles trip simultaneously during fault conditions.
• Cable-In/Cable-Out Configuration: Cable-in/cable-out (lug-lug) configuration.
• Included Lugs: Includes both line-side and load-side lugs.
• HACR Rated: HACR rated for compatible heating, air conditioning, and refrigeration equipment.
• Non-Interchangeable Trip Unit: Non-interchangeable trip unit for fixed protection settings.
• Long Service Life: Built to provide long-lasting service in commercial and industrial environments.
  

Technical Specifications

• Part Number: THJK436350WL
  
• Series: THJK4
  
• Type: Molded Case Circuit Breaker
  
• Pole Configuration: 3 Pole
  
• Amperage Rating: 350 Amps
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Configuration: Cable-In/Cable-Out (Lug-Lug)
  
• Included Accessories: Line and Load-Side Lugs
  
• A.I.C. Rating @ 600VAC: 25kA
  
• A.I.C. Rating @ 480VAC: 35kA
  
• A.I.C. Rating @ 240VAC: 65kA
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• HACR Rated: Yes
  

Material Compliance and Certifications

• HACR Rated: HACR Rated for applicable heating, ventilation, air conditioning, and refrigeration installations.
• Electrical Distribution Applications: Manufactured for use in electrical distribution systems requiring molded case circuit breaker protection.
• Original Manufacturing Specifications: Designed to meet applicable industry standards associated with its original manufacturing specifications.
• Installation Compliance: Verify compliance requirements with local electrical codes and application-specific regulations before installation.
  

Where It Works Best

• The THJK436350WL is well-suited for commercial, industrial, and institutional electrical systems that require a 350A, 3-pole molded case circuit breaker. Common applications include:
  • Commercial building power distribution
  • Industrial manufacturing facilities
  • Motor control and feeder circuit protection
  • HVAC and refrigeration equipment installations
  • Switchboards and panelboard assemblies
  • Electrical infrastructure maintenance and replacement projects
  • Facilities requiring high-interrupting-capacity circuit protection
  When maintaining or servicing existing equipment, the THJK436350WL provides a compatible form, fit, and functional replacement for systems designed to utilize THJK4 series circuit breakers.