EH34040 - 40 Amp Circuit Breaker

EH34040 - 40Amp Circuit Breaker

The EH34040 is a 40-amp, 3-pole circuit breaker made for three-phase power systems. It’s built on the EH-4 frame and is a reliable fit for commercial and industrial electrical distribution. With both thermal and magnetic trip functions, it reacts fast when there’s an overload or short circuit, keeping your system safe and cutting down on downtime. Electricians and contractors often choose this breaker when upgrading service panels or replacing worn-out units because it holds up well under heavy use.

Key Features and Benefits

• Thermal-Magnetic Trip System: Protects equipment with a thermal-magnetic trip system that responds quickly to unsafe current.
• High Fault Ratings: Handles tough fault conditions, rated at 14 kA at 480 VAC and 65 kA at 240 VAC.
• Flexible Applications: Works in a range of distribution setups including panelboards and switchboards.
• Reliable Performance: Known for steady performance in demanding commercial and industrial environments.

Technical Specifications

• Poles: 3
  
• Amp Rating: 40 A
  
• Interrupt Ratings:
  • 14 kA @ 480 VAC
  • 65 kA @ 240 VAC
• Frame: EH-4
  
• Dimensions:
  • Width: ~3.00 inches
  • Length: ~3.50 inches
  • Depth: ~2.63 inches
• Weight: ~3 lbs
  

Material Compliance and Certifications

• UL Listed: UL Listed and safety tested
• Temperature Rating: Suitable for use in both 60 °C and 75 °C environments
• Conductor Compatibility: Accepts aluminum or copper conductors, #12–#2 AWG

Suitability

• The EH34040 is designed specifically for use in NEHB panelboards. It’s often installed during new construction, service upgrades, or as a direct replacement part. If you’re working in a commercial building or industrial facility that requires reliable protection and the ability to handle high current demands, this breaker is a practical choice.