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Square D FA14040C - 1-Pole 40A I-Line Breaker (277V)

Square D
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Square D FA14040C is a 1-pole, 40 amp, 277 volt I-Line style molded case circuit breaker from Schneider Electric's FA series, designed to provide reliable overload and short circuit protection. It features a thermal magnetic trip unit with long-time and instantaneous functions, rated for 18kA interrupting capacity at 277V. The breaker measures 6.4 in (162.6 mm) in height, 1.5 in (38.1 mm) in width, and 4.13 in (104.90 mm) in depth, weighing 6 lb, with a plug-in I-Line connection and wire range of AWG 14 to AWG 1/0 for aluminum or copper conductors. It is UL Listed and operates within a temperature range of -13 to 158 °F (-25 to 70 °C). This unit is suited for industrial and commercial power distribution applications requiring single-phase, 40A branch circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Manufacturer: Schneider Electric
  • Series/Frame: FA
  • Poles: 1
  • Current Rating: 40 Amps
  • Voltage Rating: 277 Volts
  • Interrupt Rating: 18kA @ 277V
  • Trip Unit: Thermal Magnetic (Long-Time and Instantaneous)
  • Mounting Type: I-Line Style Plug-In
  • Wire Size: AWG 14 to AWG 1/0, Al/Cu
  • Dimensions (H x W x D): 6.4 in (162.6 mm) x 1.5 in (38.1 mm) x 4.13 in (104.90 mm)
  • Weight: 6 lb
  • Phase: 1
  • Temperature Rating: -13 to 158 °F (-25 to 70 °C)
  • Certifications: UL Listed


Part Number: FA14040C