TKMA836400WL **Older Style** - 400Amp Circuit Breaker

TKMA836400WL **Older Style** - 400 Amp Circuit Breaker

If you’re working with an existing TKM8 electrical system and need a breaker that matches the original setup, the TKMA836400WL is a solid fit for the job. This 400 amp, 3-pole molded case circuit breaker features the older style black face design commonly found in many commercial and industrial installations. It’s often used in facilities where keeping equipment consistent and maintaining proper fitment is important.

The TKMA836400WL is built with a thermal magnetic trip unit to help protect electrical systems from overloads and short circuits during everyday operation. Its internal common trip mechanism allows all poles to trip together when needed, helping improve overall system protection. The lug-lug, cable-in/cable-out configuration also makes installation more straightforward, especially in existing switchboards and panelboards. Line and load-side lugs are included, which can help save time during setup.

This breaker is regularly found in manufacturing plants, commercial buildings, HVAC systems, and other heavy-duty electrical applications where dependable circuit protection is needed day after day. With its HACR rating and durable construction, the TKMA836400WL is made for demanding environments and long-term use.

Key Features and Benefits

• 400 amp molded case circuit breaker
• 3-pole configuration
• Older style black face design
• TKM8 breaker type
• Thermal magnetic trip unit
• Internal common trip mechanism
• Cable-in/cable-out lug-lug configuration
• Includes line and load-side lugs
• HACR rated for HVAC applications
• Designed for commercial and industrial systems

Technical Specifications

• Part Number: TKMA836400WL
  
• Type: TKM8
  
• Poles: 3
  
• Amperage: 400A
  
• Dimensions:
  • Height: 15.5 in
  • Width: 8.25 in
  • Depth: 5.5 in
• A.I.C. Ratings:
  • 22k @ 600VAC
  • 30k @ 480VAC
  • 42k @ 240VAC
• Trip Unit: Thermal Magnetic
  
• Configuration: Cable-in/Cable-out (Lug-Lug)
  
• Trip Style: Internal Common Trip
  
• Included Accessories: Line and Load-Side Lugs
  
• Rating: HACR Rated
  

Material Compliance and Certifications

• The TKMA836400WL is intended for use in commercial and industrial electrical distribution systems requiring overcurrent protection. Its HACR rating supports use in heating, ventilation, air conditioning, and refrigeration applications. Installation and maintenance should be performed by qualified electrical professionals in accordance with local and national electrical codes.

Where It Works Best

• The TKMA836400WL is commonly used in switchboards, panelboards, feeder circuits, mechanical rooms, manufacturing facilities, and large HVAC systems using older TKM8 breaker configurations. It works especially well in applications where maintaining compatibility with existing electrical equipment is important.