FC34090 - 90 Amp Circuit Breaker

FC34090 - 90 Amp Circuit Breaker

Meet your go-to solution when you need dependable over-current protection: the FC34090 90A molded-case circuit breaker is built for performance in demanding commercial and industrial settings. With a 90-amp rating and a high interrupting capacity of 65 kA at 480 VAC and 100 kA at 240 VAC, this three-pole breaker is well suited to safeguard your electrical system against fault conditions. It uses thermal-magnetic trip technology—combining thermal overload protection with magnetic short-circuit interrupting—to give you dual-layer defense in one compact unit. The molded case is rated for durability in tough environments, and its size allows for flexible installation into panelboards, switchboards, busway plug-in units, motor control centres and combination starters without sacrificing protection or space. Choose the FC34090 when you want proven performance, reliability and safety in one package.

Key Features and Benefits

• High interrupting capacity (65 kA at 480 VAC; 100 kA at 240 VAC): Ideal for heavy industrial applications subject to high fault currents.
• Thermal-magnetic trip mechanism: Integrates both overload and short-circuit protection in one unit, reducing the need for separate devices.
• Molded-case, reinforced insulating construction: Designed to withstand harsh conditions and provide long service life.
• Versatile design: Fits panelboards, enclosures, switchboards, combination starters, motor control centres and busway plug-in units, offering flexibility in system design.
• Compact footprint: Despite high capacity ratings, the breaker’s physical size supports integration into existing equipment without major modifications.

Technical Specifications

• Poles: 3
  
• Amperage: 90 A
  
• Interrupting Rating (A.I.C.):
  • 65 kA at 480 VAC
  • 100 kA at 240 VAC
• Frame Type: FC
  
• Frequency: 60 Hz
  
• Ambient Temperature Rating: 40 °C
  
• Type: HACR (heating, air-conditioning, refrigeration compatible)
  
• Dimensions:
  • Width: 4.50″
  • Length: 8.75″
  • Depth: 4.38″
• Ship Weight: 7.50 lbs
  

Material Compliance and Certifications

• UL 489 Listed: Certified to Underwriters Laboratories standard for molded-case circuit breakers.
• NEMA AB-1 Compliant: Meets National Electrical Manufacturers Association requirements for molded case circuit breakers.
• CSA C22.2 No. 5-02 Certified: Meets Canadian Standards Association specification for moulded-case circuit breakers.
• IEC 60947-2 Compliant: Adheres to the International Electrotechnical Commission standard for circuit-breaker performance.
• Federal Specification W-C-375B/GEN: Meets specified U.S. federal requirements for circuit breakers.

Where It Works Best

• This breaker is made for systems where safety and reliability cannot be compromised. Whether you’re installing in an industrial enclosure, a commercial panelboard, a switchboard busway, a motor control centre or a combination starter, the FC34090 offers the protection you need. If you have high fault-current potential, require the extra interrupting capacity of 65 kA or 100 kA, and want a unit that aligns with global standards, this breaker is an excellent choice for your electrical distribution setup.