NEF431040R - 40Amp Circuit Breaker

NEF431040R - 40Amp Circuit Breaker

The NEF431040R 40 amp circuit breaker is designed for dependable protection in three-phase electrical systems. Built as a 3-pole, bolt-on molded case breaker, it helps protect wiring and equipment from overloads and short circuits in commercial and industrial applications. The thermal magnetic trip unit responds to both sustained overcurrent conditions and sudden fault events, helping reduce the risk of damage to connected systems. Its bolt-on configuration provides a solid, secure connection inside the panel, and the rotary handle offers clear on/off indication for safer servicing and maintenance.

This breaker is commonly used in facilities that require stable, consistent performance from their power distribution equipment. With interrupting ratings of 14kA at 480VAC and 18kA at 240VAC, the NEF431040R is suited for applications where fault current protection is a priority.

Key Features and Benefits

• 40 Amp rating for three-phase circuit protection
• 3-pole configuration for commercial and industrial systems
• Thermal magnetic trip mechanism for overload and short-circuit protection
• Bolt-on mounting for a secure and stable installation
• Rotary handle for clear breaker position visibility
• Molded case construction designed for long service life

Technical Specifications

• Model Number: NEF431040R
  
• Amperage: 40A
  
• Poles: 3
  
• Voltage Rating: Up to 480VAC
  
• Interrupting Capacity:
  • 14kA @ 480VAC
  • 18kA @ 240VAC
• Frame Type: NEF
  
• Mounting Style: Bolt-On
  
• Trip Type: Thermal Magnetic
  
• Dimensions:
  • Width: 4.13"
  • Length: 6.19"
  • Depth: 3.38"

Material Compliance and Certifications

• Molded Case Housing: The NEF431040R features a molded case housing designed to provide insulation and durability in demanding electrical environments.
• Industry Standards: It is manufactured to meet applicable industry standards for performance and safety, making it suitable for use in commercial and industrial power distribution systems that require compliant overcurrent protection devices.

Where It Works Best

• This 40 amp NEF bolt-on circuit breaker is well-suited for panelboards and distribution equipment in commercial buildings, manufacturing facilities, and other industrial settings. It is especially useful for maintaining existing systems where a secure bolt-on breaker is required. For operations that depend on steady three-phase power, this breaker helps maintain system protection and reliability without unnecessary complexity.