TJJ426300WL - 300Amp Circuit Breaker

TJJ426300WL - 300 Amp Circuit Breaker

The TJJ426300WL molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems requiring a 300 amp, 2-pole configuration. Built as part of the Q-Line series, this breaker features a thermal magnetic trip unit with internal common trip functionality to help protect connected equipment from overloads and short circuits. Its cable-in/cable-out lug-lug design simplifies installation in compatible panel and distribution applications, while the non-interchangeable trip unit helps you to maintain consistent protection settings. With interrupting capacities rated up to 22k A.I.C. at 600VAC, 30k A.I.C. at 480VAC, and 42k A.I.C. at 240VAC, the TJJ426300WL is suited for demanding electrical systems where proper overcurrent protection and equipment compatibility are essential. Built to last and engineered for reliable operation, this breaker is commonly used in power distribution, motor protection, and HVAC-related installations where HACR-rated equipment is required.

Key Features and Benefits

• 300 amp molded case circuit breaker: Designed for commercial and industrial applications.
• 2-pole configuration: Designed for compatible AC distribution systems.
• Thermal magnetic trip unit: Provides overload and short-circuit protection.
• Internal common trip mechanism: Helps disconnect both poles simultaneously during fault conditions.
• Cable-in/cable-out lug-lug connection style: Includes both line-side and load-side lugs.
• HACR rated: Suitable for use with heating, air conditioning, and refrigeration equipment.
• Q-Line series breaker: Designed for form, fit, and functional replacement applications.
• Non-interchangeable trip unit: Maintains fixed protection characteristics.
• Compact footprint: Helps support installation in space-conscious electrical enclosures.
• Built for long service life: Designed for reliable operation in properly maintained electrical systems.
  

Technical Specifications

• Part Number: TJJ426300WL
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Poles: 2
  
• Amperage Rating: 300A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Connection Type: Cable-In/Cable-Out (Lug-Lug)
  
• A.I.C. Rating @ 240VAC: 42k
  
• A.I.C. Rating @ 480VAC: 30k
  
• A.I.C. Rating @ 600VAC: 22k
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Included Accessories: Line and Load-Side Lugs
  

Material Compliance and Certifications

• HACR Rated: Suitable for applicable heating, air conditioning, and refrigeration equipment installations.
• Industry Standards: Designed to meet applicable molded case circuit breaker industry standards for electrical protection equipment.
• Compatible Distribution Systems: Intended for use in properly rated and compatible electrical distribution systems.
• Thermal Magnetic Protection Technology: Commonly used in commercial and industrial applications for dependable overcurrent protection.
  

Where It Works Best

• The TJJ426300WL is well suited for commercial buildings, industrial facilities, manufacturing equipment, distribution panels, and HVAC electrical systems requiring a 2-pole, 300 amp breaker with high interrupting capacity ratings. It is commonly used in applications where dependable overload and short-circuit protection are needed for feeders, large equipment loads, and branch circuit distribution systems. Its lug-lug configuration also makes it practical for installations requiring direct cable terminations on both the line and load sides.