TJK436350 - 350Amp Circuit Breaker

TJK436350 - 350 Amp Circuit Breaker

When your dependable circuit protection matters, the TJK436350 molded case circuit breaker is built to handle the job. Designed for commercial and industrial electrical distribution systems, this 3-pole, 350-amp breaker delivers the form, fit, and function needed for maintaining existing Q-Line equipment and power distribution setups. Its thermal magnetic trip unit responds to overloads and short circuits to help you protect connected systems and equipment, while the internal common trip mechanism disconnects all poles simultaneously during a fault condition.

The bolt-on design allows for secure installation in compatible panelboards and switchgear, making it a practical choice for maintenance teams, contractors, and facility operators working with existing infrastructure. With interrupting capacities rated at 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, the TJK436350 is suited for a wide range of demanding electrical environments. It also includes load-side lugs for easier installation and is HACR rated for HVAC and refrigeration applications. Built to last and designed for reliable operation, this breaker continues to serve as a trusted solution in many commercial and industrial systems.

Key Features and Benefits

• 350-amp Molded Case Circuit Breaker: Designed for commercial and industrial applications requiring dependable circuit protection.
• 3-Pole Configuration: Helps protect multi-phase electrical systems in demanding environments.
• Thermal Magnetic Trip Unit: Responds to overloads and short circuits to help protect connected systems and equipment.
• Internal Common Trip Mechanism: Disconnects all poles simultaneously during fault conditions for added system protection.
• Bolt-On Mounting Style: Supports secure installation in compatible panelboards and switchgear.
• Compatible with Q-Line Systems: Designed for use with designated Q-Line electrical distribution equipment.
• HACR Rated: Approved for HVAC, refrigeration, and air conditioning equipment applications.
• Includes Load-Side Lugs: Simplifies wiring and installation during replacement or maintenance work.
• Non-Interchangeable Trip Unit: Maintains fixed trip characteristics for reliable operation.
• Built for Long Service Life: Designed to provide dependable performance in demanding operating environments.
  

Technical Specifications

• Part Number: TJK436350
  
• Type: TJK4
  
• Product Category: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Mounting Style: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 350A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Trip Style: Non-Interchangeable
  
• A.I.C. Rating @ 240VAC: 42kA
  
• A.I.C. Rating @ 480VAC: 30kA
  
• A.I.C. Rating @ 600VAC: 22kA
  
• 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: Approved for HVAC and refrigeration system applications.
• Commercial and Industrial Use: Designed for use in properly rated commercial and industrial electrical systems.
• Q-Line Compatibility: Manufactured for compatibility with designated Q-Line panelboards and distribution equipment.
• Molded Case Construction: Intended for dependable circuit protection and long-term operational reliability.
  

Where It Works Best

• The TJK436350 circuit breaker is commonly found in commercial buildings, industrial facilities, manufacturing operations, and large electrical distribution systems where dependable 3-phase circuit protection is required. It works especially well in HVAC systems, motor control applications, distribution panels, and service equipment operating at up to 600VAC. For facilities maintaining existing Q-Line systems, this breaker offers a practical replacement solution that supports continued operation without changing established equipment layouts or configurations.