FC34045 - 45 Amp Circuit Breaker

FC34045 - 45 Amp Circuit Breaker

Upgrade your industrial electrical protection with the FC34045 molded-case circuit breaker by Square D/Schneider Electric—designed for dependable performance and ease of integration. This three-pole, 45-amp breaker is ideal for three-phase systems and offers high fault-current interrupting capacity to keep your panels, switchboards, and bus-plug units safe and operational. Whether you’re retrofitting an existing I-Line panelboard or spec’ing a new enclosure, the FC34045 is built to deliver peace of mind through steady performance under demanding conditions.

Key Features and Benefits

• High fault-current performance: Rated for 65 kA at 480 VAC and 100 kA at 240 VAC, the FC34045 handles severe short-circuit events with confidence, limiting damage and downtime.
• Thermal-magnetic trip design: Combines long-time (thermal) protection against sustained overcurrent and instantaneous (magnetic) response to sudden faults, offering full spectrum protection.
• Plug-in I-Line compatibility: Easily mounts into many industrial and commercial panelboards that use the I-Line frame, simplifying upgrades or replacements.
• Reliable build for industrial settings: Molded-case construction, designed for harsh environments, ensures the FC34045 remains dependable in panelboards, switchboards, and busway assemblies.
• Versatile application: Compatible with heating, air-conditioning and refrigeration (HACR) loads and other demanding industrial applications, making this model a multi-purpose choice.
  

Technical Specifications

• Amperage: 45 A
  
• Poles: 3 (three-phase)
  
• Voltage rating: up to 480 VAC
  
• Interrupting capacity:
  • 65 kA at 480 VAC
  • 100 kA at 240 VAC
• Frame type: FC / I-Line style plug-in
  
• Connection: Plug-in I-Line style
  
• Ambient temperature rating: 40 °C (typically)
  
• Dimensions/weight:
  • Width: approximately 4.50″
  • Length: approximately 8.75″
  • Depth: approximately 4.38″
  • Weight: ~7.50 lbs ship weight (when referenced)

Material Compliance and Certifications

• UL Listed: Meets rigorous safety and performance standards for molded-case circuit breakers.
• Environment-friendly: Conforms to RoHS standards, reducing use of hazardous substances in manufacture.
  

Where It Works Best

• The FC34045 is especially well-suited for industrial or commercial electrical systems where reliability and safety are paramount. If you’re managing three-phase power distribution in panelboards, switchboards or busway plug-in systems and you need a breaker that handles high fault currents and integrates easily with existing I-Line infrastructure, this is a smart choice. Whether you’re upgrading, retrofitting or building new, the FC34045 lets you specify protection that holds up under real-world stress.