TJK436125WL **Older Style** - 125Amp Circuit Breaker

TJK436125WL **Older Style** - 125 Amp Circuit Breaker

The TJK436125WL molded case circuit breaker is a dependable 3-pole, 125-amp breaker designed for your commercial and industrial power distribution systems that require consistent circuit protection in existing electrical infrastructure. Built with an older-style black-face configuration, this Type TJK4 circuit breaker is commonly used in switchboards, panelboards, and distribution equipment where maintaining original equipment compatibility is important. Its thermal magnetic trip unit protects against overloads and short circuits, while the internal common trip mechanism helps you to disconnect all poles simultaneously during a fault condition. Designed for cable-in/cable-out applications, the breaker includes both line-side and load-side lugs for straightforward installation and servicing. With strong interrupting ratings across multiple voltage classes and HACR capability, the TJK436125WL is well-suited for HVAC systems, motor loads, and other demanding electrical applications where dependable protection is essential. Built to last and engineered for long-term serviceability, this breaker remains a practical fit for maintaining and supporting legacy electrical systems.

Key Features and Benefits

• 125 Amp molded case circuit breaker: For commercial and industrial applications.
• 3-pole configuration: Designed for multi-phase electrical systems.
• Older style black face construction: For compatibility with existing installations.
• Thermal magnetic trip unit: Helps protect against overloads and short circuits.
• Internal common trip mechanism: Disconnects all poles during fault conditions.
• Cable-in/Cable-out (lug-lug) design: Simplifies field installation.
• Line-side and load-side lugs included: Supports straightforward installation and servicing.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Q-Line compatible design: Commonly used in distribution equipment and panel systems.
• Built for long-term durability: Suitable for demanding electrical environments.
  

Technical Specifications

• Part Number: TJK436125WL
  
• Type: TJK4
  
• Product Category: Molded Case Circuit Breaker
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Poles: 3
  
• Amperage: 125 Amps
  
• Voltage / A.I.C. Ratings: 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  
• Configuration: Cable-in/Cable-out (Lug-Lug)
  
• Trip Style: Internal Common Trip
  
• Face Style: Older Style Black Face
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Line & Load Lugs: Included
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• HACR Rated: For HVAC and refrigeration applications.
• Commercial and Industrial Use: Manufactured for use in commercial and industrial electrical distribution systems.
• Industry Standards: Designed to meet applicable industry standards for molded case circuit breakers.
• Equipment Compatibility: Suitable for use in properly rated panelboards, switchgear, and distribution equipment.
  

Where It Works Best

• The TJK436125WL circuit breaker is commonly installed in commercial buildings, industrial facilities, manufacturing environments, HVAC equipment systems, motor control applications, electrical distribution panels, switchboards, and power distribution equipment. Its form, fit, and electrical ratings make it a practical solution for maintaining continuity in established electrical systems where equipment compatibility is important, especially where existing legacy systems require compatible replacement components.