NB232040 - 40Amp Circuit Breaker

NB232040 - 40Amp Circuit Breaker

The NB232040 40 amp circuit breaker is engineered to deliver dependable overcurrent protection for residential and light commercial electrical systems. Built on the trusted NB frame, this 3 pole thermal magnetic circuit breaker is rated for 240VAC and 10kA interrupting capacity, helping safeguard panels, feeders, and branch circuits from overloads and short circuits. Its bolt-on mounting style ensures a secure mechanical and electrical connection, making it a reliable choice for maintenance professionals and electricians who need consistent performance in existing panelboards. When system uptime and safety matter, the NB232040 offers the protection and durability required to keep your electrical infrastructure operating smoothly.

Key Features and Benefits

• 40 Amp Continuous Protection: Designed to handle up to 40 amps, providing stable and consistent circuit protection in demanding residential and light commercial applications.
• 3 Pole Configuration: Ideal for protecting three-phase systems or multi-pole applications requiring coordinated interruption.
• Thermal Magnetic Trip Unit: Dual protection technology responds to both prolonged overloads (thermal) and instantaneous short circuits (magnetic), enhancing overall electrical safety.
• Bolt-On Design: Ensures a tight, secure installation that reduces the risk of loose connections and improves long-term reliability.
• NB Frame Construction: Built on a proven frame platform known for dependable performance and extended service life.
  

Technical Specifications

• Manufacturer Part Number: NB232040
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity: 10,000 AIC @ 240VAC
  
• Frame Type: NB
  
• Trip Type: Thermal Magnetic
  
• Mounting Type: Bolt-On
  
• Dimensions:
  • 3.00" W x 3.38" L x 2.31" D
• Weight: 2.75 lbs
  

Material Compliance and Certifications

• Industry Standards: The NB232040 circuit breaker is manufactured using high-quality components that meet strict industry safety and performance standards. Each unit is tested to verify proper calibration and trip functionality under real-world operating conditions. Designed in accordance with established electrical safety requirements, this breaker helps ensure compliance with applicable codes when installed correctly within compatible equipment.
  

Where It Works Best

• The NB232040 40A 3 pole circuit breaker is well-suited for residential service panels and light commercial distribution systems requiring reliable 240V protection. It is particularly effective in maintenance and replacement applications where matching the existing NB frame configuration is essential. Electricians and facility managers rely on this breaker to maintain safe, code-aligned electrical systems while minimizing downtime during upgrades or repairs.