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Square D FCJ34045 - Molded Case Circuit Breaker 45A 3P 480V

Square D
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Square D FCJ34045 is a 45 Amp, 3-pole molded case circuit breaker from the FCJ series, designed to provide thermal magnetic protection with long-time and instantaneous (LI) trip functions for industrial power distribution systems. It is rated for 480V AC operation with a 65kA interrupting capacity at 480V, and features a bolt-on connection style within an F Frame construction. The unit weighs 7 lb and supports line and load side lug terminals compatible with 14 to 1 AWG aluminum or copper conductors, operating at a 40°C ambient temperature. This breaker complies with industry standards for overcurrent protection in three-phase applications. Typical applications include motor control centers, panelboards, and switchboards requiring reliable circuit isolation and fault interruption.

Key Features & Specifications
  • Manufacturer: Square D
  • Series/Frame: FCJ
  • Amperage: 45 Amps
  • Voltage Rating: 480 VAC
  • Poles: 3
  • Connection Type: Bolt-On (I-Line Style Plug-In)
  • Interrupting Rating: 65kAIC @ 480V
  • Trip Unit: Thermal Magnetic with Long Time and Instantaneous Trip
  • Terminal Connection: Line and Load Side Lug
  • Wire Gauge Compatibility: 14 to 1 AWG AL/CU
  • Temperature Rating: 40°C
  • Weight: 7 lb
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: F Frame
  • Phase: 3
  • Protection: Thermal Magnetic