NA40 - 40Amp Circuit Breaker

NA40 - 40Amp Circuit Breaker

The NA40 40 Amp circuit breaker is a dependable Stab-Lok® miniature circuit breaker engineered by Schneider Electric to help safeguard residential and light commercial electrical systems. Designed for 120V AC applications, this single-pole breaker delivers consistent protection against overloads and short circuits, helping prevent damage to wiring and connected equipment. Its plug-in mounting style allows for straightforward installation in compatible load centers, making it a practical choice for electricians, contractors, and maintenance professionals who need reliable performance and code-compliant protection. With a 10 kA interrupting rating and compatibility with both copper and aluminum conductors, the NA40 is built to handle demanding electrical conditions while maintaining safety and efficiency.

Key Features and Benefits

• 40 Amp Protection: Rated at 40 amps to support higher-load branch circuits while maintaining dependable circuit interruption during faults.
• 10 kA Breaking Capacity: Designed to safely interrupt fault currents up to 10,000 amps, helping protect panels and connected systems.
• Single-Pole (1P) Design: Ideal for 120V AC branch circuit applications.
• Plug-In Mounting: Quick and secure installation in compatible Stab-Lok load centers.
• Screw Terminal Connections: Provides a solid, stable wire termination for long-term reliability.
• Wide Wire Compatibility: Accepts AWG 14 to AWG 2 copper or aluminum conductors for added flexibility in the field.
• Environmentally Conscious Design: Green Premium labeled and compliant with major environmental standards.

Technical Specifications

• Product Type: Miniature Circuit Breaker
  
• Manufacturer: Schneider Electric
  
• Model Number: NA40
  
• Rated Current (In): 40 Amp
  
• Rated Operational Voltage (Ue): 120V AC
  
• Poles: 1P (Single Pole)
  
• Interrupting Rating: 10 kA
  
• Mounting Type: Plug-In
  
• Terminal Type: Screw Terminal
  
• Wire Range: AWG 14 to AWG 2 (Aluminum or Copper)
  
• Height: 3.00 in (7.62 cm)
  
• Width: 1.00 in (2.54 cm)
  
• Length: 3.40 in (8.64 cm)
  
• Weight: 4.96 oz (140.61 g)
  

Material Compliance and Certifications

• CSA Certified: The NA40 circuit breaker is CSA certified, confirming it meets established safety and performance requirements.
• Green Premium Designation: It carries Schneider Electric’s Green Premium designation, reflecting attention to environmental responsibility throughout the product lifecycle.
• Regulatory Compliance: The breaker is mercury-free, compliant with the EU RoHS Directive (with exemptions), and supported by a REACh declaration, helping contractors and facility managers meet sustainability and regulatory objectives.

Where It Works Best

• The NA40 40A Stab-Lok circuit breaker is well suited for residential service panels, small commercial buildings, and light industrial environments that require reliable 120V circuit protection. It performs effectively in branch circuits supplying appliances, HVAC components, and other moderate-to-high load equipment. Because it supports both aluminum and copper wiring, it adapts easily to a wide range of electrical system configurations—whether you’re replacing an existing breaker or completing a new installation.