THFK236125WL - 125 Amp Circuit Breaker

THFK236125WL - 125 Amp Circuit Breaker

The THFK236125WL is a 125-amp, 3-pole molded case circuit breaker designed for use in your commercial and industrial electrical distribution systems. Built on the F225 line molded-case frame, this breaker features an interchangeable thermal-magnetic trip unit that provides dependable overcurrent and short-circuit protection for equipment, feeders, and power distribution circuits. Its compact design and field-proven construction make it well-suited for maintaining existing electrical infrastructure where form, fit, and function compatibility are essential.

Engineered for applications requiring high interrupting capacity, the THFK236125WL offers 65kAIC at 240VAC, 25kAIC at 480VAC, and 18kAIC at 600VAC, helping you to protect electrical systems from fault conditions across a wide range of operating voltages. This unit includes both line-side and load-side lugs, simplifying installation and replacement in compatible assemblies. Designed to withstand demanding industrial environments, the THFK236125WL delivers the reliable circuit protection expected of thermal-magnetic molded-case breakers built for long service life.

Key Features and Benefits

• 125 Amp current rating: 125 Amp current rating
• 3-pole configuration for three-phase electrical systems: 3-pole configuration for three-phase electrical systems
• THFK series molded case circuit breaker: THFK series molded case circuit breaker
• Thermal magnetic trip unit with interchangeable design: Thermal magnetic trip unit with interchangeable design
• F225 line molded case frame construction: F225 line molded case frame construction
• Includes line-side and load-side lugs: Includes line-side and load-side lugs
• Interrupting ratings:
  • 65kA at 240VAC
  • 25kA at 480VAC
  • 18kA at 600VAC
• Designed for commercial and industrial power distribution applications: Designed for commercial and industrial power distribution applications
• Suitable as a form, fit, and function replacement in compatible equipment: Suitable as a form, fit, and function replacement in compatible equipment
• Durable construction built to provide long-term service in demanding environments: Durable construction built to provide long-term service in demanding environments
  

Technical Specifications

• Part Number: THFK236125WL
  
• Type: THFK
  
• Frame: F225 Line Molded Case
  
• Trip Unit: Interchangeable Thermal Magnetic
  
• Amperage Rating: 125 Amps
  
• Poles: 3
  
• Voltage / A.I.C. Rating: 65kA @ 240VAC
  
• Voltage / A.I.C. Rating: 25kA @ 480VAC
  
• Voltage / A.I.C. Rating: 18kA @ 600VAC
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 4.13 in.
  • Depth: 3.81 in.
• Included Accessories: Line-Side and Load-Side Lugs
  

Material Compliance and Certifications

• Electrical Distribution System Use: This molded case circuit breaker is manufactured for use in electrical distribution systems and should be installed and maintained in accordance with applicable electrical codes, equipment specifications, and manufacturer guidelines.
• Compliance Verification: Users should verify compliance requirements, certifications, and suitability for their specific application before installation.
  

Where It Works Best

• Industrial facilities and manufacturing plants
• Commercial buildings and office complexes
• Power distribution equipment
• Switchboards and panel systems
• Motor and equipment protection circuits
• Feeder circuit applications
• Electrical maintenance and replacement projects involving compatible THFK-series installations
• Its combination of a 125A rating, 3-pole configuration, and high interrupting capacity makes it a practical solution for protecting electrical distribution systems operating at up to 600VAC.