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Square D FJA140405 - Molded Case Circuit Breaker 40A 277V 1P

Square D
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Square D FJA140405 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial and commercial electrical systems. It features a 40A current rating and a 277V AC voltage rating, housed in a compact, 1 lb I-Line style plug-in unit for straightforward panel integration. This single-pole breaker utilizes thermal-magnetic protection with long-time and instantaneous (LI) trip functions and is UL Listed, operating effectively within a temperature range of -25 to 70 °C (-13 to 158 °F). It is engineered for branch circuit protection in single-phase applications, offering an interrupting capacity of 65kA at 480V AC.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, I-Line Style Plug-In Connection
  • Voltage Rating: 277V AC
  • Current Rating: 40A
  • Dimensions: Compact I-Line Plug-In Design
  • Standards: UL Listed
  • Applications: Industrial and Commercial Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 1
  • Voltage: 277V
  • Amperage: 40A
  • AIC rating: 65kA @ 480V AC
  • Connection: I-Line Style Plug-In
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: PowerPact FJA
  • Trip Type: Thermal-Magnetic
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Certification: UL Listed
  • Item Subcategory: Molded Case
  • Family: Powerpact
  • Type: FJA
  • Weight: 1 lb


Product Identification
  • Manufacturer Part Number: FJA140405
  • Manufacturer: Schneider Electric