EGB34040 - 40 Amp Circuit Breaker

EGB34040 - 40 Amp Circuit Breaker

When you need a 40 Amp, 3-pole circuit breaker that fits seamlessly into a compatible NF panelboard, the EGB34040 delivers the form, fit, and function needed to keep your existing electrical system operating as designed. Whether you're replacing a worn breaker during routine maintenance or restoring service after a failure, this bolt-on breaker is built to integrate with existing installations without requiring panel modifications.

Designed for 480Y/277 VAC three-phase systems, the EGB34040 is commonly found in commercial buildings, industrial facilities, and other applications using compatible NF panelboards. Its bolt-on mounting provides a secure installation, while interrupting ratings of up to 65kA at 240 VAC and 35kA at 480Y/277 VAC allow it to meet the protection requirements of many commercial electrical systems.

Key Features and Benefits

• 40 Amp continuous current rating
• 3-pole configuration for three-phase electrical systems
• Bolt-on mounting for secure installation in compatible NF panelboards
• Thermal-magnetic trip unit protects against overloads and short circuits
• Built-in trip indicator allows quick visual identification of a tripped breaker
• Rated for systems up to 480Y/277 VAC
• Interrupt ratings up to:
  • 65kA @ 120/240 VAC
  • 65kA @ 240 VAC
  • 35kA @ 277 VAC
  • 35kA @ 480Y/277 VAC
• HACR rated for HVAC applications
• UL Listed for HID lighting applications
• Designed for form, fit, and functional replacement in compatible legacy electrical systems
• Built for dependable, long-term service
  

Technical Specifications

• Catalog Number: EGB34040
  
• Rated Current: 40 Amps
  
• Number of Poles: 3
  
• Frame Type: E-Frame (EGB Series)
  
• Mounting Type: Bolt-On
  
• Maximum Operating Voltage: 480Y/277 VAC
  
• Trip Unit Technology: Thermal-Magnetic
  
• Trip Unit Rating: 1800A
  
• Holding Current: 630A
  
• Protection: Overload and Short-Circuit
  
• Interrupt Ratings:
  • 65kA @ 120 VAC
  • 65kA @ 120/240 VAC
  • 65kA @ 240 VAC
  • 35kA @ 277 VAC
  • 35kA @ 480Y/277 VAC
• Electrical Connections: Aluminum lugs
  
• Compatible Wire Range:
  • Aluminum: AWG 12–2/0
  • Copper: AWG 14–2/0
• Tightening Torque:
  • 34.5 lb-in (3.9 N·m) for AWG 14–10
  • 49.6 lb-in (5.6 N·m) for AWG 8–2/0
• Operating Temperature: 40°C (104°F)
  
• Dimensions: 5.66" H × 2.94" W × 4.05" D
  
• Weight: Approximately 4 lbs
  

Material Compliance and Certifications

• cULus Listed
• UL Listed for High Intensity Discharge (HID) applications
• HACR Rated
• TAA Compliant
• Calibrated for operation in ambient temperatures up to 40°C (104°F)
  

Where It Works Best

• Commercial office buildings
• Industrial facilities
• Manufacturing plants
• Schools and universities
• Healthcare facilities
• HVAC equipment circuits
• HID lighting systems
• Three-phase power distribution panels