THJK436125WL - 125Amp Circuit Breaker

THJK436125WL - 125 Amp Circuit Breaker

The THJK436125WL molded case circuit breaker is a 3-pole, 125-amp circuit protection device designed for use in your commercial and industrial electrical distribution systems. Part of the THJK4 Q-Line family, this breaker features a cable-in/cable-out (lug-lug) configuration, making it suitable for applications requiring direct conductor termination on both the line and load sides. Equipped with a non-interchangeable thermal magnetic trip unit and internal common trip mechanism, the THJK436125WL helps you to provide dependable overcurrent and short-circuit protection while maintaining proper coordination across all poles. Built to last and engineered for compatibility within existing electrical systems, this breaker includes both line-side and load-side lugs for straightforward installation and maintenance.

Key Features and Benefits

• 125 Amp Current Rating: 125 Amp current rating for commercial and industrial power distribution applications.
• 3-Pole Design: 3-pole design provides protection across three-phase electrical systems.
• THJK4 Q-Line Construction: THJK4 Q-Line molded case circuit breaker construction.
• Cable-In/Cable-Out Configuration: Cable-in/cable-out (lug-lug) configuration for direct conductor connections.
• Thermal Magnetic Trip Unit: Non-interchangeable thermal magnetic trip unit helps protect against overloads and short circuits.
• Internal Common Trip Mechanism: The internal common trip mechanism disconnects all poles simultaneously during fault conditions.
• Factory-Installed Lugs: Includes factory-installed line-side and load-side lugs.
• HACR Rated: HACR rated for use in heating, air conditioning, and refrigeration applications where applicable.
• Form, Fit, and Functional Replacement: Designed for form, fit, and functional replacement in compatible electrical equipment.
• Compact Footprint: Compact footprint helps simplify installation in designated panelboard and switchgear applications.
  

Technical Specifications

• Part Number: THJK436125WL
  
• Type: THJK4
  
• Current Rating: 125 Amps
  
• Number of Poles: 3
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Connection Type: Cable-In/Cable-Out (Lug-Lug)
  
• A.I.C. Rating:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Included Accessories: Line and Load-Side Lugs
  
• Rating: HACR Rated
  

Material Compliance and Certifications

• Industry Standards: The THJK436125WL circuit breaker is manufactured and tested to meet applicable industry standards for molded case circuit breakers.
• HACR Rating: The unit carries an HACR rating, making it suitable for use in heating, air conditioning, and refrigeration-related applications where equipment specifications permit.
• Installation Verification: Users should always verify compatibility with the intended electrical system and applicable local codes before installation.
  

Where It Works Best

• The THJK436125WL is commonly used in commercial buildings, industrial facilities, manufacturing operations, HVAC systems, distribution equipment, panelboards, and other three-phase power applications requiring a 125-amp molded case circuit breaker. Its lug-lug configuration makes it particularly well-suited for installations where direct cable termination is preferred. This breaker is an effective form, fit, and functional replacement option for maintaining compatible electrical distribution systems while preserving existing equipment configurations.