THKMA31200WL - 1200Amp Circuit Breaker

THKMA31200WL  - 1200 Amp Circuit Breaker

The THKMA31200WL is a 1200A, 3-pole molded case circuit breaker used in your commercial and industrial power distribution systems where high-current protection is required. It features an interchangeable thermal-magnetic trip unit and an internal common-trip design that opens all poles simultaneously when a fault occurs. Configured as a cable-in/cable-out (lug-lug) breaker, the THKMA31200WL includes both line-side and load-side lugs. Its interrupting capacity is rated at 65 kA at 240 VAC, 35 kA at 480 VAC, and 25 kA at 600 VAC, making it suitable for a wide range of distribution and feeder applications. This breaker is commonly found in switchboards, panelboards, motor distribution equipment, and other electrical systems that require a 1200-amp circuit breaker. The HACR rating also makes it suitable for qualifying heating, ventilation, air conditioning, and refrigeration installations. For facilities that maintain existing electrical infrastructure, the THKMA31200WL provides the form, fit, and function needed to continue operating compatible equipment. Like many industrial molded case circuit breakers, it was built for demanding service conditions and long-term use.

Key Features and Benefits

• 1200-amp current rating
• 3-pole configuration
• Interchangeable thermal magnetic trip unit
• Internal common trip operation
• Cable-in/cable-out (lug-lug) design
• Includes line-side and load-side lugs
• HACR rated
• Suitable for commercial and industrial electrical systems
• Designed for high-capacity power distribution applications

Technical Specifications

• Part Number: THKMA31200WL
  
• Type: THKMA
  
• Poles: 3
  
• Amperage Rating: 1200A
  
• Trip Unit: Interchangeable Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Configuration: Cable-In/Cable-Out (Lug-Lug)
  
• Included Accessories: Line-Side and Load-Side Lugs
  
• A.I.C. Rating @ 240VAC: 65kA
  
• A.I.C. Rating @ 480VAC: 35kA
  
• A.I.C. Rating @ 600VAC: 25kA
  
• Height: 15.5 in.
  
• Width: 8.25 in.
  
• Depth: 5.5 in.
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• HACR rated
• Intended for commercial and industrial electrical distribution applications
• Manufactured for molded case circuit breaker installations requiring overcurrent protection
• Confirm compatibility with equipment specifications and applicable electrical codes before installation

Where It Works Best

• The THKMA31200WL is typically used in manufacturing facilities, processing plants, commercial buildings, utility systems, and large industrial installations. Common applications include feeder circuits, switchboards, panelboards, motor control equipment, and other power distribution systems where a 1200A, 3-pole thermal magnetic circuit breaker is required.