THJK436350 - 350Amp Circuit Breaker

THJK436350 - 350 Amp Circuit Breaker

The THJK436350 molded case circuit breaker is a 3-pole, 350-amp circuit breaker designed for use in your commercial and industrial electrical distribution systems requiring dependable overcurrent and short-circuit protection. As part of the THJK4 Q-Line series, this bolt-on circuit breaker features a non-interchangeable thermal magnetic trip unit with internal common trip functionality, helping to provide your coordinated protection across all poles during fault conditions. Built for demanding applications, the THJK436350 includes load-side lugs for installation convenience and is HACR rated, making it suitable for heating, air conditioning, and refrigeration equipment applications where applicable.

The THJK436350 molded case circuit breaker is engineered for long service life and is designed to deliver the proper form, fit, and function required in compatible electrical systems. With interrupting ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, the THJK436350 is well-suited for protecting feeders, distribution equipment, motor loads, and other critical power distribution components. Its thermal magnetic trip mechanism provides both overload and instantaneous short-circuit protection, helping maintain system safety and equipment protection in a wide range of operating environments.

Key Features and Benefits

• Part Number: THJK436350
• Rated Current: 350 Amps
• 3-Pole Configuration: Designed for three-phase power distribution systems.
• THJK4 Q-Line Series: Molded case circuit breaker construction for commercial and industrial applications.
• Bolt-On Mounting Design: Provides secure installation within compatible electrical distribution equipment.
• Thermal Magnetic Trip Unit: Provides overload and short-circuit protection.
• Non-Interchangeable Trip Unit: Fixed trip unit configuration.
• Internal Common Trip Mechanism: Trips all poles simultaneously during fault conditions.
• HACR Rated: Suitable for applicable HVAC and refrigeration applications.
• Includes Load-Side Lugs: Added installation convenience.
• Long Service Life: Designed for long-lasting service in commercial and industrial environments.
• Application Versatility: Suitable for protecting feeders, panelboards, switchboards, and distribution equipment.
  

Technical Specifications

• Manufacturer Part Number: THJK436350
  
• Type: THJK4
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Poles: 3
  
• Amperage Rating: 350A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Trip Unit Style: Non-Interchangeable
  
• Mounting: Bolt-On
  
• A.I.C. Rating @ 600VAC: 25kA
  
• A.I.C. Rating @ 480VAC: 35kA
  
• A.I.C. Rating @ 240VAC: 65kA
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Suitable for applicable heating, air conditioning, and refrigeration equipment applications.
• Industry Standards: Manufactured and tested to applicable industry standards for molded case circuit breakers.
• Installation Compliance: Designed for installation in compatible electrical distribution equipment in accordance with applicable electrical codes and manufacturer requirements.
• Protection Features: Thermal magnetic protection for overload and short-circuit conditions.
  

Where It Works Best

• The THJK436350 is commonly used in commercial buildings, industrial facilities, manufacturing operations, utility infrastructure, and large electrical distribution systems requiring a 350-amp, 3-pole molded case circuit breaker. It is well-suited for feeder circuits, panelboards, switchboards, motor distribution applications, HVAC equipment, and other power distribution systems where the specified voltage and interrupting ratings are required. Its bolt-on design and included load-side lugs make it a practical solution for maintaining compatibility within existing electrical installations.