FC34040 - 40 Amp Circuit Breaker

FC34040 - 40 Amp Circuit Breaker

Meet a high-performance solution designed to keep your electrical systems running safely and smoothly: the FC34040 rated at 40 A. This three-pole molded-case circuit breaker delivers outstanding protection in demanding industrial and commercial settings — thanks to its exceptional interrupting capacity of 65 kA at 480 VAC and 100 kA at 240 VAC. Whether you’re installing inside an enclosure, panelboard, switchboard or motor control centre, the FC34040 is built to perform under pressure and help preserve system uptime and operator safety.

Key Features & Benefits

• High interrupting capacity: With 65 kA at 480 VAC and 100 kA at 240 VAC, this breaker handles serious fault currents so you can count on reliable protection under challenging conditions.
• Thermal-magnetic protection: Covers both overloads (thermal) and short-circuits (magnetic), protecting your wiring, devices and equipment from multiple fault modes.
• Durable molded-case construction: Encased in reinforced insulating material to provide high dielectric strength and long lifespan in industrial environments.
• Versatile installation: Works seamlessly in enclosures, panelboards, switchboards, busway plug-in units, combination starters and motor control centres — ideal for new systems or upgrades.
• Space-saving design: Compact dimensions make it easier to fit into existing footprints or constrained electrical spaces without sacrificing performance.

Technical Specifications

• Poles: 3
  
• Amperage: 40 A
  
• Interrupting Rating:
  • 65 kA @ 480 VAC
  • 100 kA @ 240 VAC
• Frame Type: FC
  
• Frequency: 60 Hz
  
• Temp Rating: 40 °C
  
• Type: HACR (Heating, Air-Conditioning, Refrigeration)
  
• Dimensions:
  • Width: 4.50″
  • Length: 8.75″
  • Depth: 4.38″
• Shipping Weight: Approx. 7.50 lbs
  

Material Compliance & Certifications

• UL Listing: Listed under the UL 489 standard by Underwriters Laboratories Inc.
• NEMA Compliance: Compliant with NEMA AB-1 requirements from the National Electrical Manufacturers Association.
• CSA Certification: Certified to CSA C22.2 No. 5-02 by the Canadian Standards Association.
• IEC Compliance: Meets international requirements of IEC 60947-2.
• Federal Specification: Certified under Federal Specification W-C-375B/GEN.

Where It Works Best

• If you’re working on an industrial or commercial electrical distribution system — think motor control centres, switchboards, plug-in busway assemblies or panelboard upgrade projects — the FC34040 is a go-to choice. Its high interrupting capacity means it’s especially suited to installations where fault current levels are elevated and where system reliability is imperative. Whether you’re building new infrastructure or performing a system refresh, this breaker brings peace of mind and strong performance without making installation overly complex.