TJJ426250 - 250Amp Circuit Breaker

TJJ426250 - 250 Amp Circuit Breaker

The TJJ426250 molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems where consistent overcurrent protection is essential. Built as part of the Q-Line series, this 2-pole, 250-amp breaker features a thermal magnetic trip unit with internal common trip functionality to help you safeguard connected equipment and electrical infrastructure from overloads and short circuits. Its bolt-on mounting design supports secure installation in compatible panelboards and switchgear, while the included load-side lugs simplify wiring connections during maintenance or replacement projects.

With interrupting ratings of 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, the TJJ426250 is well-suited for demanding electrical environments requiring reliable fault interruption capability. The non-interchangeable trip unit configuration helps maintain consistent protection settings, making it a practical choice for facilities operating legacy electrical systems or maintaining existing equipment configurations. HACR rating compatibility also allows use in heating, air conditioning, and refrigeration applications where applicable. Built with durable molded case construction, this breaker is engineered for long service life in everyday operational conditions.

Key Features and Benefits

• 250 Amp Molded Case Circuit Breaker: Designed for commercial and industrial power distribution applications requiring dependable overcurrent protection.
• 2-Pole Configuration: Suitable for compatible multi-phase electrical systems and related distribution equipment.
• Thermal Magnetic Trip Unit: Provides both overload and short-circuit protection to help safeguard connected systems and infrastructure.
• Internal Common Trip Design: Helps disconnect both poles simultaneously during fault conditions for added system protection.
• Bolt-On Mounting Style: Supports secure installation in approved panelboards, switchgear, and electrical assemblies.
• Includes Load-Side Lugs: Simplifies conductor termination during installation, maintenance, or replacement projects.
• HACR Rated: Suitable for compatible heating, air conditioning, and refrigeration system applications.
• Built for Long-Term Durability: Engineered for dependable operation in demanding commercial and industrial electrical environments.
  

Technical Specifications

• Part Number: TJJ426250
  
• Type: TJJ
  
• Product Series: Q-Line
  
• Poles: 2
  
• Amperage: 250A
  
• Voltage / A.I.C. Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• Lugs: Includes Load-Side Lugs
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Approved for compatible heating, air conditioning, and refrigeration applications.
• Industry Compatibility: Manufactured for use in compatible electrical distribution systems requiring molded case circuit protection.
• Applicable Standards: Designed to meet applicable industry standards associated with molded case circuit breakers.
• Safe Operational Support: Thermal magnetic protection helps support safe operation within properly designed electrical systems.
  

Where It Works Best

• The TJJ426250 circuit breaker is commonly used in commercial buildings, industrial facilities, manufacturing operations, and large-scale electrical distribution systems requiring dependable 250-amp overcurrent protection. It is especially suitable for maintenance projects, replacement applications, and existing installations using compatible Q-Line bolt-on breaker configurations. HVAC equipment, panelboards, switchboards, and facility power distribution systems can benefit from its combination of thermal magnetic protection and high interrupting capacity.