FCL34040 - 40 Amp Circuit Breaker

FCL34040 - 40 Amp Circuit Breaker

Engineered for serious protection, the FCL34040 40 A molded case circuit breaker brings high-capacity fault interruption and dependable overload/short-circuit protection to your electrical system. This three-pole 40 amp breaker uses the proven FCL frame, making it a solid choice for industrial and commercial installations where durability and performance are essential. With an interrupting capacity of 65 kA at 480 V AC and an impressive 100 kA at 240 V AC, the FCL34040 sets a strong foundation for protecting panelboards, busway plug-in units, combination starters, motor control centers, and more.

Key Features and Benefits

• High fault-interrupting capability: (65kA @ 480 V AC; 100kA @ 240 V AC) provides excellent protection in high-demand settings.
• Thermal-magnetic trip mechanism: Ensures the breaker responds correctly to both sustained overloads and sudden short-circuit events.
• Three-pole design: Makes it ideal for three-phase systems, giving full protection across all phases.
• Molded case construction: Enhances longevity and service life—even when operating in challenging environments.
• Rated for operation at 40 °C ambient temperature: So it fits a wide range of industrial and commercial environments.
  

Technical Specifications

• Frame Type: FCL
  
• Poles: 3
  
• Rated Amperage: 40 A
  
• Interrupting Capacity & Voltage:
  • 65 kA @ 480 V AC
  • 100 kA @ 240 V AC
• Dimensions:
  • Width: 4.50 inches
  • Length: 6.00 inches
  • Depth: 3.13 inches
• Weight: 6.50 lbs
  
• Frequency: 60 Hz
  
• Ambient Temperature Rating: 40 °C
  
• Type: HACR (Heating, Air-conditioning, and Refrigeration), Thermal-Magnetic, Molded Case Circuit Breaker
  

Material Compliance and Certifications

• Manufacturing Standards: Manufactured using quality materials that meet stringent industry standards, the FCL34040 supports safe, compliant electrical installations.
• Certifications: Certified to applicable electrical protection standards, this breaker gives you confidence that your system is built to handle demanding applications and remains within regulatory requirements.
  

Where It Works Best

• If you are installing or upgrading equipment in a panelboard, switchboard, busway plug-in unit, combination starter, or a motor control center—this breaker is a great fit. Its high interrupting capacity means it can handle fault conditions in intensive commercial or industrial settings. Whether you're protecting motors, HVAC systems, distribution boards or other critical electrical infrastructure, the FCL34040 will help keep your system safe and running smoothly.