TKMA836400 **Older Style** - 400Amp Circuit Breaker

TKMA836400 **Older Style** - 400 Amp Circuit Breaker

The TKMA836400 Older Style Black Face molded case circuit breaker is built for your commercial and industrial electrical distribution systems that require dependable circuit protection and compatibility with existing equipment layouts. Designed as a 3-pole, 400-amp breaker in the TKM8 series, this unit features a thermal magnetic trip unit with internal common trip functionality to help you protect connected systems from overloads and short circuits. Its bolt-on mounting design allows for secure installation in compatible switchgear and panelboard applications, while the included load-side lugs help simplify setup and maintenance. With interrupting capacities rated at 22k @ 600VAC, 30k @ 480VAC, and 42k @ 240VAC, the TKMA836400 is well-suited for demanding power distribution environments where consistent operation and proper system coordination matter. Built with long-term service applications in mind, this breaker is commonly used in legacy electrical systems where matching form, fit, and function is essential.

Key Features and Benefits

• 400 amp molded case circuit breaker: Designed for industrial and commercial power distribution.
• 3-pole configuration: Built for three-phase electrical systems.
• Older style black face design: Supports compatibility with existing installations.
• Thermal magnetic trip unit: Helps provide overload and short-circuit protection.
• Internal common trip mechanism: Improves coordinated tripping across all poles.
• Bolt-on mounting style: Supports secure and stable installation.
• Includes load-side lugs: Adds installation convenience.
• HACR rated: Suitable for heating, air conditioning, and refrigeration applications.
• Built for long service life: Designed to support properly maintained electrical systems.
• Dependable replacement compatibility: Suitable for applications requiring reliable replacement performance.
  

Technical Specifications

• Part Number: TKMA836400
  
• Series Type: TKM8
  
• Breaker Type: Industrial Molded Case Circuit Breaker
  
• Trip Unit: Interchangeable Thermal Magnetic Trip Unit
  
• Poles: 3
  
• Amperage: 400A
  
• Voltage & Interrupting Ratings:
  • 22k A.I.C. @ 600VAC
  • 30k A.I.C. @ 480VAC
  • 42k A.I.C. @ 240VAC
• Mounting Type: Bolt-On
  
• Trip Function: Internal Common Trip
  
• 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.
• Industry Application: Designed for use in commercial and industrial electrical distribution systems.
• Construction Standards: Manufactured to meet applicable molded case circuit breaker construction and performance standards for its class and application.
• Professional Installation: Intended for use by qualified electrical professionals in properly rated equipment and assemblies.
  

Where It Works Best

• The TKMA836400 is commonly installed in industrial facilities, manufacturing plants, commercial buildings, mechanical equipment systems, and large electrical distribution panels requiring a 400A three-pole breaker. It is particularly useful in existing systems where maintaining compatibility with older equipment designs is important. This breaker is also a practical fit for HVAC equipment, motor distribution systems, and heavy-duty power applications that depend on reliable molded case circuit protection.