HEF437040 - 40Amp Circuit Breaker

HEF437040 - 40Amp Circuit Breaker

The HEF437040 40A circuit breaker is a practical choice for protecting three-phase electrical systems in commercial and industrial settings. Built on the HEF frame, this 3-pole breaker is designed to handle everyday power distribution needs while helping prevent damage caused by overloads and short circuits. With interrupting ratings up to 65kA at 240VAC, it’s suitable for systems where higher available fault current may be present. For maintenance teams and electrical contractors, this breaker provides straightforward, dependable protection that supports safe and efficient operation.

Key Features and Benefits

• Rated for 40 amps of continuous current
• 3-pole configuration for three-phase applications
• Interrupting capacity up to 65kA at 240VAC
• Designed to protect against overloads and short circuits
• HEF frame construction for lasting performance

Technical Specifications

• Manufacturer Part Number: HEF437040
  
• Amperage Rating: 40A
  
• Poles: 3
  
• Interrupting Capacity:
  • 18kA @ 600VAC
  • 25kA @ 480VAC
  • 65kA @ 240VAC
• Frame Type: HEF
  
• Shipping Weight: Approximately 7.50 lbs
  

Material Compliance and Certifications

• UL Listed
• CSA Certified
• Manufactured to meet established electrical safety standards

Where It Works Best

• The HEF437040 3-pole 40 amp breaker works well in commercial buildings, manufacturing facilities, and general industrial power distribution panels. It’s often used for equipment protection, panel upgrades, or as a direct replacement in existing systems where matching specifications are required.