TJK436125 - 125Amp Circuit Breaker

TJK436125 - 125 Amp Circuit Breaker

The TJK436125 molded case circuit breaker is designed for your dependable circuit protection in commercial and industrial electrical distribution systems where consistent operation and proper equipment fit are essential. Built as part of the Q-Line family, this 3-pole, 125-amp breaker features a thermal-magnetic trip unit with internal common trip functionality to help you protect electrical systems from overloads and short circuits. Its bolt-on mounting style supports secure installation in compatible panelboards and switchgear applications, while the included load-side lugs simplify wiring connections during maintenance or replacement projects.

Engineered for use in demanding electrical environments, the TJK436125 offers interrupting capacities rated at 22k A.I.C. at 600VAC, 30k A.I.C. at 480VAC, and 42k A.I.C. at 240VAC. The non-interchangeable trip unit configuration helps maintain consistent protection characteristics within the system. HACR rating compatibility also makes this breaker suitable for heating, air conditioning, and refrigeration equipment applications where approved overcurrent protection is required. With a compact molded case design built to last, this breaker is commonly used as a form, fit, and functional replacement in existing electrical systems requiring a Type TJK4 circuit breaker.

Key Features and Benefits

• 125 Amp Molded Case Circuit Breaker: Designed for commercial and industrial power distribution applications requiring dependable circuit protection.
• 3-Pole Configuration: Designed for use in three-phase electrical systems where coordinated protection across all poles is essential.
• Thermal Magnetic Trip Unit: Provides overload and short-circuit protection to help maintain safe electrical system operation.
• Internal Common Trip Design: Helps disconnect all poles simultaneously during fault conditions for improved system protection.
• Bolt-On Mounting: Supports secure installation in compatible panelboards and switchgear equipment.
• Includes Load-Side Lugs: Simplifies field wiring connections during maintenance or replacement projects.
• HACR Rated: Suitable for use with heating, air conditioning, and refrigeration equipment applications.
• Non-Interchangeable Trip Unit: Maintains fixed protection settings within the electrical system.
• Built for Demanding Environments: Designed for long service life in commercial and industrial electrical applications.
• Legacy System Compatibility: Suitable as a form, fit, and functional replacement in systems using Type TJK4 breakers.
  

Technical Specifications

• Part Number: TJK436125
  
• Type: TJK4
  
• Product Category: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Poles: 3
  
• Amperage: 125A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• A.I.C. Rating:
  • 22k @ 600VAC
  • 30k @ 480VAC
  • 42k @ 240VAC
• HACR Rated: Yes
  
• Lugs: Includes Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in
  • Width: 8.25 in
  • Depth: 3.81 in

Material Compliance and Certifications

• HACR Rated: Approved for use with heating, air conditioning, and refrigeration equipment applications.
• Commercial and Industrial Use: Built for use in commercial and industrial electrical distribution systems.
• Molded Case Construction: Manufactured as a molded case circuit breaker with thermal magnetic protection.
• Industry Compatibility: Designed to meet applicable industry standards for compatible electrical equipment applications.
  

Where It Works Best

• Commercial buildings
• Industrial facilities
• Distribution panels
• Motor control applications
• HVAC and refrigeration systems
• Manufacturing equipment
• Existing Q-Line electrical systems requiring Type TJK4 compatibility
• Electrical maintenance and replacement projects where matching ratings and dimensions are important