E3040 - 40 Amp Circuit Breaker

E3040 - 40 Amp Circuit Breaker

When you're working on a three-phase electrical system, especially in an established commercial or industrial panel, replacing a breaker is usually about one thing—matching the original specifications so the system keeps running the way it was designed. The E3040 40 Amp 3-Pole Circuit Breaker is built for that kind of application. It’s a Type E thermal-magnetic breaker designed for systems requiring a 40 Amp rating, a 3-pole configuration, and 240 VAC service, commonly used in legacy electrical distribution equipment.

The E3040 is rated for a 10 kA interrupting capacity at 240 VAC, making it suitable for a variety of general replacement applications within its listed electrical limits. It also includes a non-interchangeable trip unit, which helps maintain the equipment's original factory configuration. With a 40°C temperature rating and included load terminals, it is designed for straightforward installation in compatible panels without requiring changes to the existing layout or wiring.

In field use, this breaker is typically selected during maintenance or repair work to keep the existing electrical system intact. Matching the correct amperage, pole configuration, and voltage rating helps ensure the system continues operating as intended without unnecessary modifications or downtime.

Key Features and Benefits

• 40 Amp current rating for three-phase circuit protection
• 3-pole configuration for 240VAC systems
• Type E thermal-magnetic breaker design
• Thermal and magnetic trip response for overloads and short circuits
• Non-interchangeable trip unit maintains original configuration
• 10kA interrupting capacity at 240VAC
• Rated for operation in ambient temperatures up to 40°C
• Includes load terminals for installation in compatible equipment
• Compact footprint for use in existing electrical systems
• Built to last for ongoing maintenance and replacement applications
• Suitable for form, fit, and functional replacement requirements
  

Technical Specifications

• Part Number: E3040
  
• Type: E
  
• Product Type: Thermal-Magnetic Circuit Breaker
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• Voltage Rating: 240 VAC
  
• Interrupting Capacity: 10kA @ 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Temperature Rating: 40°C (104°F)
  
• Included Terminals: Load Terminals
  
• Dimensions:
  • Width: 4.13 in
  • Height: 6.00 in
  • Depth: 3.31 in
  • Dimensions: 4.13"W x 6.00"H x 3.31"D
• Approximate Shipping Weight: 4.50 lbs
  

Material Compliance and Certifications

The E3040 should be installed and maintained by qualified electrical personnel in accordance with applicable electrical codes, safety standards, and manufacturer instructions. Before installation, verify compatibility with the existing system, including voltage rating, amperage rating, interrupting capacity, pole configuration, and physical fit. No additional compliance or certification information was provided in the available specifications.

Where It Works Best

• The E3040 is commonly used in:
• Commercial electrical distribution systems
• Industrial facilities and manufacturing environments
• Institutional buildings such as schools and healthcare facilities
• Maintenance and repair work on existing equipment
• Three-phase systems requiring a Type E circuit breaker replacement
• 240VAC electrical systems
• Legacy panels where matching original breaker specifications is required
• Equipment requiring a 40 Amp 3-pole breaker configuration