FC34070 - 70 Amp Circuit Breaker

FC34070 - 70 Amp Circuit Breaker

Looking for a high-performance yet easy-to-integrate circuit breaker for demanding industrial or commercial setups? The FC34070 70 A molded-case breaker delivers dependable protection when you need it most. With a three-pole configuration and industry-leading interrupting capacity (65 kA at 480 VAC and 100 kA at 240 VAC), this breaker gives you peace of mind knowing fault currents will be managed safely. It combines both thermal overload and magnetic short-circuit trip mechanisms to cover the full spectrum of overcurrent events. Housed in a reinforced molded insulating frame that resists wear, its compact 4.50″ W × 8.75″ L × 4.38″ D design makes it suitable for retrofits or new builds alike. Whether you’re working on motor control centers, plug-in busway units, panelboards or switchboards, the FC34070 is built to perform and built to last.

Key Features and Benefits

• Exceptional interrupting capacity: Rated to interrupt up to 65 kA at 480 VAC and 100 kA at 240 VAC, this breaker offers top-tier protection against high fault current scenarios.
• Dual-mode protection (thermal + magnetic): Protects against both slower overloads (via thermal trip) and fast short-circuit events (via magnetic trip), giving you full-spectrum defense.
• Durable molded-case construction: The insulating case is reinforced for high dielectric strength and longevity — ideal for rough industrial environments.
• Space-smart design: Its compact dimensions make it easier to install in existing enclosures or panelboards without major modifications.
• Wide application scope: Designed to work seamlessly in enclosures, panelboards, switchboards, busway plug-in units, combination starters and motor control centers.

Technical Specifications

• Poles: 3
  
• Amperage: 70 A
  
• Interrupting Rating:
  • 65 kA at 480 VAC
  • 100 kA at 240 VAC
• Frame Type: FC
  
• Frequency: 60 Hz
  
• Ambient Temperature Rating: 40 °C
  
• Type: HACR
  
• Dimensions:
  • Width: 4.50 inches
  • Length: 8.75 inches
  • Depth: 4.38 inches
• Ship Weight: 7.50 lbs
  

Material Compliance and Certifications

• UL Listing: Listed to UL 489 by Underwriters Laboratories – ensures safe and reliable operation.
• NEMA Compliance: Meets NEMA AB-1 standard 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 standard IEC 60947-2 for circuit breakers.
• Federal Specification: Complies with Federal Specification W-C-375B/GEN for general electrical distribution equipment.

Where It Works Best

• If you’re outfitting an industrial or commercial electrical distribution system and need a dependable 70-amp protective device, this breaker is an excellent choice. It fits especially well in systems such as motor control centers, switchboards, panelboards, plug-in busway units and combination starter enclosures. Because of its high interrupting capacity and dual-trip protection, it’s ideal in environments where fault currents may be large and where reliable operation under heavy demands is required. And thanks to its compact size and reinforced construction, you’ll find installation and long-term service demands easier to manage.