TJJ436250 - 250Amp Circuit Breaker

TJJ436250 - 250 Amp Circuit Breaker

The TJJ436250 molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems. Built as part of the trusted Q-Line family, this 3-pole, 250-amp breaker features a thermal magnetic trip unit with internal common trip functionality to help protect equipment and conductors from overloads and short circuits. Its bolt-on mounting design supports secure installation in compatible panelboards and switchboards, while the included load-side lugs help simplify field wiring connections. HACR-rated for heating, air conditioning, and refrigeration applications, the TJJ436250 is commonly used in facilities where reliable overcurrent protection and long-term serviceability are important. Constructed for lasting durability and designed to match original system specifications, this breaker is a practical form, fit, and function replacement for existing compatible electrical systems.

Key Features and Benefits

• 250A Molded Case Circuit Breaker: Designed for commercial and industrial power distribution.
• 3-Pole Configuration: Intended for three-phase electrical systems.
• Thermal Magnetic Trip Unit: Helps protect against overloads and short circuits.
• Internal Common Trip Mechanism: Enhances coordinated circuit interruption.
• Bolt-On Mounting Style: Supports a stable, secure installation.
• Load-Side Lugs Included: Allows convenient conductor termination.
• HACR Rated: Suitable for HVAC and refrigeration system applications.
• Q-Line Series Compatibility: Matches existing equipment configurations.
• Non-Interchangeable Trip Unit: Helps maintain original factory specifications.
• Dependable Performance: Built to provide reliable operation in demanding electrical environments.
  

Technical Specifications

• Part Number: TJJ436250
  
• Type: TJJ
  
• Product Family: Q-Line
  
• Poles: 3
  
• Amperage Rating: 250A
  
• Voltage & A.I.C. Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Mounting Type: Bolt-On
  
• HACR Rated: Yes
  
• Lugs Included: Yes – Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in
  • Width: 8.25 in
  • Depth: 3.81 in

Material Compliance and Certifications

• Industry Standards: The TJJ436250 circuit breaker is manufactured for use in accordance with applicable industry standards for molded case circuit breakers and electrical distribution equipment.
• HACR Rating: Its HACR rating supports use in heating, ventilation, air conditioning, and refrigeration applications where approved equipment protection is required.
• Q-Line Compatibility: Designed for compatibility within designated Q-Line systems, this breaker helps maintain proper form, fit, and functional replacement requirements in existing installations.
  

Where It Works Best

• The TJJ436250 is well-suited for commercial buildings, manufacturing facilities, distribution equipment, mechanical rooms, and industrial control systems requiring 250-amp three-phase circuit protection. It is commonly applied in panelboards, switchgear, and HVAC electrical systems where bolt-on molded case breakers are specified. Facilities maintaining existing Q-Line electrical infrastructure often use this breaker to support continued operation and equipment compatibility without altering the original system design.