TJK426350 - 350Amp Circuit Breaker

TJK426350 - 350 Amp Circuit Breaker

The TJK426350 molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems where higher amperage capacity and consistent operation are essential. Built as part of the trusted Q-Line series, this 2-pole breaker features a non-interchangeable thermal magnetic trip unit with internal common trip functionality, helping protect connected equipment from overloads and short circuits while maintaining coordinated interruption across both poles. Its bolt-on mounting style allows for a secure installation in compatible panelboard and switchboard applications, making it a practical form, fit, and functional replacement for existing systems requiring a Type TJK4 breaker.

Rated at 350 amps, the TJK426350 is HACR rated for use in heating, air conditioning, and refrigeration applications. It also includes load-side lugs for added installation convenience. Designed with durability in mind, this molded case circuit breaker is built to last in demanding environments where reliable power distribution matters every day. Whether used in manufacturing facilities, commercial buildings, or heavy-duty electrical infrastructure, the TJK426350 helps maintain safe and stable operation across critical systems.

Key Features and Benefits

• 350 amp molded case circuit breaker: For commercial and industrial applications.
• 2-pole configuration: With internal common trip operation.
• Type TJK4 breaker: Designed for compatible Q-Line systems.
• Thermal magnetic trip unit: Provides overload and short-circuit protection.
• Bolt-on mounting design: Supports secure installation.
• Includes load-side lugs: For simplified field connections.
• HACR rated: For HVAC and refrigeration equipment applications.
• Built for long-term use: In demanding electrical environments.
• Suitable as a form, fit, and functional replacement: In existing equipment setups.
  

Technical Specifications

• Part Number: TJK426350
  
• Manufacturer Series: Q-Line
  
• Type: TJK4
  
• Poles: 2
  
• Amperage Rating: 350A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• A.I.C. Rating: 22k @ 600VAC; 30k @ 480VAC; 42k @ 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 Rated: For heating, air conditioning, and refrigeration applications.
• Manufactured for compatible electrical distribution systems: Requiring molded case circuit protection.
• Designed to meet applicable industry standards: For circuit breaker operation and safety within rated capacities.
  

Where It Works Best

• The TJK426350 circuit breaker is commonly used in commercial facilities, industrial plants, distribution equipment, HVAC systems, and large electrical panels that require dependable 350 amp protection. Its bolt-on configuration and Type TJK4 compatibility make it well-suited for maintenance projects, retrofit applications, and replacement installations in existing Q-Line electrical systems.