THJK436125 - 125Amp Circuit Breaker

THJK436125 - 125 Amp Circuit Breaker

The THJK436125 circuit breaker is a 125 Amp, 3-pole molded case circuit breaker designed for use in your electrical distribution systems requiring dependable overcurrent and short-circuit protection. Built as part of the Q-Line™ THJK4 series, this bolt-on breaker features a thermal magnetic trip unit, internal common trip, and non-interchangeable trip design to help you maintain consistent protection across all phases. With interrupting ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, the THJK436125 is well-suited for commercial and industrial power distribution applications where reliable circuit protection is essential.

This breaker includes load-side lugs for installation convenience and is HACR rated, making it suitable for applications involving heating, air conditioning, and refrigeration equipment. Its molded case construction is built to last and designed to provide dependable protection in panelboards, switchboards, and other electrical systems requiring a 125-amp, three-phase circuit breaker solution.

Key Features and Benefits

• 125 Amp Current Rating: 125 Amp current rating for commercial and industrial electrical systems.
• 3-Pole Configuration: 3-pole configuration for three-phase power distribution applications.
• Type THJK4 Molded Case Circuit Breaker: Type THJK4 molded case circuit breaker.
• Bolt-On Mounting Design: Bolt-on mounting design for secure installation.
• Thermal Magnetic Trip Unit: Thermal magnetic trip unit provides protection against overloads and short circuits.
• Internal Common Trip Mechanism: Internal common trip mechanism helps ensure simultaneous tripping of all poles during fault conditions.
• Non-Interchangeable Trip Unit Design: Non-interchangeable trip unit design.
• HACR Rated: HACR rated for heating, air conditioning, and refrigeration applications.
• Includes Load-Side Lugs: Includes load-side lugs.
• Built to Last: Built to last for long-term service in demanding electrical environments.
• Suitable for Use: Suitable for use in panelboards, switchboards, and power distribution equipment.
  

Technical Specifications

• Part Number: THJK436125
  
• Type: THJK4
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Mounting: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 125 Amps
  
• Trip Unit: Thermal Magnetic
  
• Trip Design: Non-Interchangeable
  
• Trip Mechanism: Internal Common Trip
  
• Interrupting Rating: 25kA @ 600VAC
  
• Interrupting Rating: 35kA @ 480VAC
  
• Interrupting Rating: 65kA @ 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: HACR Rated for heating, air conditioning, and refrigeration equipment applications.
• Industry Standards: Manufactured and tested to applicable industry standards for molded case circuit breakers.
• Installation Requirements: Designed for installation and use in appropriately rated electrical distribution equipment.
• Compatibility Verification: Verify equipment compatibility, voltage requirements, and local code compliance prior to installation.
  

Where It Works Best

• The THJK436125 is commonly used in commercial buildings, industrial facilities, institutional properties, manufacturing environments, and other electrical distribution systems requiring a 125A, 3-pole bolt-on molded case circuit breaker. It is particularly well-suited for feeder circuits, distribution equipment, panelboards, switchboards, and HVAC-related applications where a thermal magnetic breaker with common trip functionality is required. This breaker serves as a form-fit-function replacement in compatible systems that utilize the Q-Line THJK4 platform and matching electrical specifications.