THJK436225 - 225Amp Circuit Breaker

THJK436225 - 225 Amp Circuit Breaker

The THJK436225 molded case circuit breaker is a 225-amp, 3-pole circuit breaker designed for dependable overcurrent and short-circuit protection in your commercial and industrial electrical distribution systems. As part of the THJK4 Q-Line series, this bolt-on circuit breaker features a thermal magnetic trip unit, providing both inverse time overload protection and instantaneous response to short-circuit conditions. Its internal common trip mechanism ensures that all poles disconnect simultaneously when a fault is detected, helping you to protect connected equipment and electrical systems.

Built for use in demanding electrical applications, the THJK436225 is HACR rated and includes load-side lugs for simplified installation. With interrupting ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, this breaker is suitable for a wide range of distribution panels, switchboards, and industrial power systems where reliable circuit protection is required. Designed with a non-interchangeable trip unit, it maintains consistent protection characteristics throughout its service life. Like many molded case circuit breakers used in legacy and existing installations, it was built to provide long-term durability and dependable operation when properly applied and maintained.

Key Features and Benefits

• 225 Amp Current Rating: 225 Amp current rating for commercial and industrial power distribution applications.
• 3-Pole Configuration: 3-pole configuration for three-phase electrical systems.
• THJK4 Q-Line Design: THJK4 Q-Line design for compatible bolt-on panelboard installations.
• Thermal Magnetic Trip Unit: The thermal magnetic trip unit provides overload and short-circuit protection.
• Internal Common Trip Mechanism: The internal common trip mechanism disconnects all poles simultaneously during fault conditions.
• HACR Rated: HACR rated for heating, air conditioning, and refrigeration equipment applications.
• Load-Side Lugs Included: Includes load-side lugs for convenient field installation.
• Non-Interchangeable Trip Unit: Non-interchangeable trip unit maintains fixed protection settings.
• Molded Case Construction: Molded case construction designed for long service life in demanding environments.
• Replacement Capability: Suitable as a form, fit, and functional replacement in compatible electrical systems.
  

Technical Specifications

• Part Number: THJK436225
  
• Type: THJK4
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Mounting: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 225 Amps
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• A.I.C. Rating @ 240VAC: 65kA
  
• A.I.C. Rating @ 480VAC: 35kA
  
• A.I.C. Rating @ 600VAC: 25kA
  
• 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 applications involving heating, ventilation, air conditioning, and refrigeration equipment.
• Industry Standards: Manufactured and tested to applicable industry standards for molded case circuit breakers.
• Installation Requirements: Designed for installation in compatible electrical distribution equipment according to applicable electrical codes and manufacturer specifications.
• Protection Technology: Thermal magnetic protection technology combines overload and short-circuit protection within a single device.
  

Where It Works Best

• The THJK436225 is well-suited for commercial buildings, industrial facilities, manufacturing operations, institutional properties, and other three-phase power distribution systems requiring a 225-amp molded case circuit breaker. It is commonly used in panelboards, switchboards, distribution equipment, and HVAC-related applications where a bolt-on Q-Line breaker with thermal magnetic protection and common trip functionality is required. Its electrical ratings make it appropriate for a variety of existing installations that demand dependable circuit protection and compatibility with designated THJK4 series equipment.