TKMA836450 **Older Style** - 450Amp Circuit Breaker

TKMA836450 **Older Style** - 450 Amp Circuit Breaker

The TKMA836450 is a 3-pole molded case circuit breaker built for your commercial and industrial power distribution systems that still rely on proven electrical equipment. Featuring the Older Style Black Face design, this breaker is often used as a direct replacement in existing setups where matching the original configuration is important. The bolt-on mounting style helps keep installation secure, and the included load-side lugs help save time during wiring and maintenance work.

Rated at 450 amps, the TKMA836450 uses a thermal magnetic trip unit to help protect electrical systems from overloads and short circuits. The internal common trip design allows all poles to trip together when needed, helping protect connected equipment and maintain system safety. With interrupting ratings of 22k @ 600VAC, 30k @ 480VAC, and 42k @ 240VAC, this breaker is commonly found in heavy-duty electrical applications including HVAC equipment, manufacturing facilities, motor controls, and commercial distribution systems.

Many facilities continue using breakers like the TKMA836450 because they were built for long service life and dependable operation in demanding environments. If you're replacing an existing breaker in older switchgear or panel equipment, matching the correct frame type and configuration can help avoid unnecessary modifications and downtime.

Key Features and Benefits

• 450 Amp molded case circuit breaker
• Older Style Black Face configuration
• 3-pole breaker for three-phase systems
• Thermal magnetic trip unit for overload and short-circuit protection
• Internal common trip operation
• Bolt-on mounting design
• Includes load-side lugs
• HACR Rated for HVAC and refrigeration applications
• Interchangeable trip unit design
• Designed for commercial and industrial electrical systems

Technical Specifications

• Part Number: TKMA836450
  
• Type: TKM8
  
• Poles: 3
  
• Amperes: 450A
  
• Trip Unit: Thermal Magnetic
  
• A.I.C. Rating:
  • 22k @ 600VAC
  • 30k @ 480VAC
  • 42k @ 240VAC
• Mounting Style: Bolt-On
  
• Face Style: Older Style Black Face
  
• Common Trip: Internal Common Trip
  
• Lugs: Includes Load-Side Lugs
  
• HACR Rated: Yes
  
• Height: 15.5 in.
  
• Width: 8.25 in.
  
• Depth: 5.5 in.
  

Material Compliance and Certifications

• HACR Rated: Suitable for commercial and industrial power distribution applications.
• System Compatibility: Designed for use in compatible molded case circuit breaker systems.
  

Where It Works Best

• The TKMA836450 is commonly used in industrial facilities, commercial buildings, mechanical equipment rooms, and manufacturing operations where higher-amperage three-phase protection is required. It works well in switchboards, panelboards, motor control centers, and HVAC systems that require a breaker matching older installed equipment.
• This breaker is especially useful for maintenance teams and electricians working with legacy electrical systems where proper fit and compatibility matter just as much as electrical ratings.