THFK236125WL **Older Style** - 125 Amp Circuit Breaker

THFK236125WL **Older Style** - 125 Amp Circuit Breaker

The THFK236125WL is a 125-amp, 3-pole molded-case circuit breaker built on the F225 frame and equipped with an interchangeable thermal-magnetic trip unit. Featuring the older style black face, this breaker is commonly used in your existing commercial and industrial electrical systems where maintaining compatibility with installed equipment is important.

Rated for applications up to 600VAC, the THFK236125WL provides overcurrent and short-circuit protection for three-phase power distribution systems. The breaker includes both line-side and load-side lugs, helping you to streamline installation in compatible equipment. Its thermal-magnetic trip mechanism responds to both prolonged overload conditions and high-current fault events, helping protect conductors and connected equipment from electrical damage.

Built for demanding electrical environments, this circuit breaker remains a practical choice for maintenance projects, equipment repairs, and replacement applications where matching electrical ratings and physical configuration matter.

Key Features and Benefits

• 125 amp continuous current rating: 125 amp continuous current rating.
• 3-pole configuration for three-phase systems: 3-pole configuration for three-phase systems.
• Older style black face construction: Older style black face construction.
• F225 molded case frame: F225 molded case frame.
• Interchangeable thermal magnetic trip unit: Interchangeable thermal magnetic trip unit.
• Includes line-side and load-side lugs: Includes line-side and load-side lugs.
• Rated for systems up to 600VAC: Rated for systems up to 600VAC.
• Provides overload and short-circuit protection: Provides overload and short-circuit protection.
• Suitable for maintenance and replacement applications: Suitable for maintenance and replacement applications.
• Built for long-term service in commercial and industrial environments: Built for long-term service in commercial and industrial environments.

Technical Specifications

• Part Number: THFK236125WL
• Type: THFK
• Frame: F225
• Trip Unit: Interchangeable Thermal Magnetic
• Poles: 3
• Amperage: 125A
• Interrupting Rating: 18kA @ 600VAC
• Interrupting Rating: 25kA @ 480VAC
• Interrupting Rating: 65kA @ 240VAC
• Dimensions:
  • Height: 10.13 in.
  • Width: 4.13 in.
  • Depth: 3.81 in.
• Included Accessories: Line-Side and Load-Side Lugs
• Face Style: Older Style Black Face

Material Compliance and Certifications

• Industry Standards: This circuit breaker was manufactured to meet applicable industry standards for molded case circuit breakers in electrical distribution applications.
• Compatibility Verification: Users should verify ratings, compatibility, and installation requirements for their specific equipment and system design.

Where It Works Best

• The THFK236125WL is frequently found in:
  • Industrial facilities
  • Manufacturing plants
  • Commercial buildings
  • Power distribution equipment
  • Switchgear assemblies
  • Panelboard installations
  • Equipment maintenance and retrofit projects
  • Existing systems require a breaker with matching ratings and configuration
• When maintaining established electrical systems, matching the original breaker's ratings, pole configuration, and physical design can be critical. The THFK236125WL provides those characteristics while delivering the circuit protection expected in commercial and industrial applications.