TJJ426350 - 350Amp Circuit Breaker

TJJ426350 - 350 Amp Circuit Breaker

The TJJ426350 molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems where consistent overcurrent protection is essential. Built as part of the trusted Q-Line family, this 2-pole, 350-amp breaker features a thermal magnetic trip unit with an internal common trip mechanism that helps protect connected equipment from overloads and short circuits. Its bolt-on mounting design supports secure installation in compatible panelboards and switchgear applications, while the included load-side lugs simplify conductor termination during installation or replacement projects.

Engineered for applications requiring reliable interruption capacity, the TJJ426350 offers interrupting ratings of 22 kA at 600 VAC, 30 kA at 480 VAC, and 42 kA at 240 VAC. The breaker is also HACR rated, making it suitable for heating, air conditioning, and refrigeration equipment applications. With its non-interchangeable trip unit construction and durable molded case design, this circuit breaker is built to last and intended for long-term service in demanding electrical environments where proper fit and function are critical.

Key Features and Benefits

• 350 Amp Continuous Current Rating: Designed for high-amperage distribution applications requiring dependable circuit protection.
• 2-Pole Configuration: Suitable for systems requiring dual-pole protection and common trip functionality.
• Thermal Magnetic Trip Unit: Helps respond to both sustained overload conditions and short-circuit events.
• Internal Common Trip Design: Simultaneously disconnects both poles during fault conditions for added system protection.
• Bolt-On Mounting Style: Supports secure installation in compatible electrical distribution equipment.
• HACR Rated: Appropriate for HVAC and refrigeration system applications.
• Includes Load-Side Lugs: Simplifies installation and conductor connections.
• Q-Line Compatibility: Designed for use in compatible legacy electrical distribution systems requiring Type TJJ breakers.
  

Technical Specifications

• Part Number: TJJ426350
  
• Manufacturer Series: Q-Line
  
• Type: TJJ
  
• Product Type: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage Rating: 350A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• Interrupting Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• 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 Certification: The TJJ426350 circuit breaker is manufactured for use in commercial and industrial electrical systems requiring properly rated overcurrent protection devices. Its HACR certification supports use in heating, cooling, and refrigeration applications where compliant protection equipment is required.
• Installation Compliance: As with all electrical components, installation and application should follow applicable local electrical codes and equipment manufacturer specifications.
  

Where It Works Best

• The TJJ426350 is commonly used in commercial buildings, industrial power distribution systems, HVAC equipment installations, manufacturing facilities, electrical panelboards and switchgear, replacement projects requiring compatible Type TJJ breakers, and facilities maintaining the existing Q-Line electrical infrastructure. Its combination of high amperage capacity, bolt-on installation, and thermal magnetic protection makes it a practical fit for systems that require dependable circuit protection and compatibility with existing equipment configurations.