TKMA826400 **Older Style** - 400Amp Circuit Breaker

TKMA826400 **Older Style** - 400 Amp Circuit Breaker

The TKMA826400, an older-style black-face molded-case circuit breaker, is designed for your dependable protection in commercial and industrial electrical distribution systems where maintaining compatibility with existing equipment is essential. Built with a thermal magnetic trip unit and internal common trip, this 2-pole, 400-amp breaker helps protect electrical systems from overloads and short circuits while supporting consistent operation in demanding environments. Its bolt-on mounting configuration provides secure installation, and the included load-side lugs simplify field connections. Designed for use in legacy power distribution systems, the TKMA826400 offers the form, fit, and function needed to maintain or service existing systems without unnecessary modifications.

With interrupting ratings of 22k at 600VAC, 30k at 480VAC, and 42k at 240VAC, this industrial molded case circuit breaker is suited for a wide range of heavy-duty electrical applications. The interchangeable thermal magnetic trip unit offers practical flexibility for maintenance and servicing, while its HACR rating makes it suitable for heating, air conditioning, and refrigeration equipment applications. Built to last and engineered for long-term serviceability, the TKMA826400 remains a reliable choice for industrial facilities, manufacturing plants, commercial buildings, and large electrical distribution systems requiring a compatible replacement breaker.

Key Features and Benefits

• 400 Amp Industrial Molded Case Circuit Breaker: Designed for commercial and industrial electrical distribution applications requiring dependable 400A circuit protection.
• 2-Pole Configuration: Supports commercial and industrial power distribution systems where two-pole protection is required.
• Older Style Black Face Design: Maintains compatibility with existing legacy electrical systems and equipment.
• Bolt-On Mounting: Provides secure installation within electrical distribution equipment.
• Thermal Magnetic Trip Unit: Helps protect against overloads and short circuits while supporting reliable electrical system operation.
• Interchangeable Trip Unit: Supports maintenance flexibility and servicing convenience.
• Internal Common Trip Mechanism: Provides coordinated circuit interruption functionality.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Includes Load-Side Lugs: Simplifies electrical field connections during installation.
• Legacy Equipment Compatibility: Designed for form, fit, and functional replacement in existing electrical infrastructure setups.
  

Technical Specifications

• Part Number: TKMA826400
  
• Type: TKM8
  
• Product Style: Older Style Black Face
  
• Poles: 2
  
• Amperage: 400A
  
• Voltage & A.I.C. Rating:
  • 22k @ 600VAC
  • 30k @ 480VAC
  • 42k @ 240VAC
• Trip Unit Type: Thermal Magnetic
  
• Mounting Type: Bolt-On
  
• Trip Configuration: Internal Common Trip
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 15.5 in.
  • Width: 8.25 in.
  • Depth: 5.5 in.

Material Compliance and Certifications

• HACR Rated: Suitable for heating, air conditioning, and refrigeration applications.
• Commercial and Industrial Use: Manufactured for use in commercial and industrial electrical distribution systems.
• Industry Electrical Protection Standards: Designed to meet applicable industry electrical protection standards for molded case circuit breakers.
• Legacy Infrastructure Compatibility: Suitable for maintaining compatibility within existing legacy electrical infrastructure.
  

Where It Works Best

• The TKMA826400 molded case circuit breaker is commonly used in industrial manufacturing facilities, commercial buildings and office complexes, HVAC distribution systems, motor control applications, electrical switchboards and panel systems, power distribution equipment requiring 400A circuit protection, and maintenance and retrofit projects involving legacy electrical systems. Its combination of high interrupting capacity, bolt-on installation, and interchangeable thermal magnetic trip unit makes it a practical solution for facilities that depend on maintaining continuity within existing electrical distribution equipment.