NB111040 - 40Amp Circuit Breaker

NB111040 - 40Amp Circuit Breaker

The NB111040 40 Amp circuit breaker is designed to provide dependable overcurrent protection in 120VAC electrical systems. Built as a single-pole, bolt-on breaker, it helps protect wiring and connected equipment from damage caused by overloads and short circuits. With a 10k AIC (10,000 amp interrupting capacity) rating, this breaker is capable of safely interrupting high fault currents, making it a reliable choice for maintaining existing residential or light commercial electrical panels. Its bolt-on configuration allows for a firm, stable installation directly to the panel bus, which helps ensure consistent electrical contact over time. Whether you're replacing a worn breaker or performing routine electrical maintenance, the NB111040 offers straightforward compatibility within designated NB frame panels. It’s a practical solution for keeping your system protected without unnecessary upgrades or modifications.

Key Features and Benefits

• 40 Amp Rating: Designed to protect 120VAC branch circuits rated at 40 amps.
• Single-Pole Configuration: Ideal for individual circuit protection in residential and light commercial applications.
• Thermal Magnetic Trip Mechanism: Provides protection against both sustained overloads and sudden short circuits.
• 10k AIC Rating: Safely interrupts up to 10,000 amps of fault current.
• Bolt-On Mounting: Creates a secure connection to compatible panelboards for added stability.

Technical Specifications

• Model: NB111040
  
• Amperage: 40 Amps
  
• Voltage: 120VAC
  
• Poles: 1
  
• Interrupting Capacity: 10k AIC
  
• Frame Type: NB
  
• Dimensions:
  • Width: 1.00"
  • Length: 3.38"
  • Depth: 2.31"
• Shipping Weight: 1.60 lbs
  

Material Compliance and Certifications

• The NB111040 circuit breaker is manufactured using durable materials intended for long-term electrical performance.
• It is built in accordance with applicable industry safety standards for molded case circuit breakers and is suitable for installation in properly rated and compatible panelboards.

Where It Works Best

• This 40 amp bolt-on breaker is well suited for replacement and maintenance work in existing NB frame panels.
• It’s commonly used in residential and light commercial branch circuit applications where consistent 120VAC protection is required.
• Electricians and maintenance professionals often choose this style of breaker when a secure, bolt-on connection is preferred over plug-in designs.