NM632400 - 400Amp Circuit Breaker

NM632400 - 400Amp Circuit Breaker

The NM632400 400 Amp Circuit Breaker is built for serious electrical protection in demanding commercial and industrial environments. Designed to manage high-current applications with confidence, this 3-pole thermal magnetic molded case breaker delivers dependable defense against overloads and short circuits. Its 40°C rating supports consistent performance in everyday operating conditions, while the bolt-on design allows for a secure fit in existing electrical systems. With load-side lug terminals included, installation and maintenance are straightforward, making this breaker a practical solution when system reliability matters most. Whether you’re maintaining critical infrastructure or servicing power distribution equipment, the NM632400 offers the protection and stability professionals expect.

Key Features and Benefits

• 400 Amp Capacity: Handles high electrical loads with steady performance for industrial and commercial systems.
• Thermal Magnetic Protection: Combines thermal and magnetic trip functions to respond accurately to overloads and short circuits.
• Bolt-On Design: Helps ensure a solid, dependable connection while simplifying installation and servicing.
• Molded Case Construction: Built to perform reliably in demanding environments with elevated operating temperatures.
• Load-Side Lugs Included: Saves time during setup and supports a secure electrical connection.

Technical Specifications

• Amperage Rating: 400 Amps
• Number of Poles: 3
• Voltage Rating: Up to 600 VAC
• Interrupting Capacity (AIC):
  • 22kA @ 600 VAC
  • 30kA @ 480 VAC
  • 42kA @ 240 VAC
• Frame Type: NM
• Dimensions:
  • Width: 8.19 in
  • Length: 15.50 in
  • Depth: 4.13 in
• Ship Weight: 38 lbs
• Operating Temperature Rating: 40°C

Material Compliance and Certifications

• The NM632400 Circuit Breaker is manufactured using quality materials that meet established industry standards for electrical safety and performance. It complies with applicable regulatory requirements, helping ensure dependable operation and peace of mind in critical power applications.

Where It Works Best

• This circuit breaker is well suited for maintenance and service work in commercial buildings, industrial facilities, and power distribution systems where high amperage protection is essential. It’s an excellent choice for maintaining existing electrical infrastructure that requires consistent, reliable circuit protection under heavy loads.