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Square D FYB14020B - Molded Case Circuit Breaker 20A 1P 277V

Square D
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Square D FYB14020B is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in industrial and commercial electrical systems. It features a 20A current rating and a 277V AC voltage rating, suitable for single-phase applications. The breaker is constructed with a compact F-frame design, measuring 162.6 mm H x 38.1 mm W x 104.9 mm D and weighing 2 lb, and utilizes a thermal-magnetic trip unit for combined long-time and instantaneous trip functions. It complies with industry standards for safety and performance, offering an interrupting capacity of 18kA at 277V. Typical applications include protection for feeders, branch circuits, and equipment within panelboards and switchboards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, I-Line Style Plug-In Connection
  • Voltage Rating: 277V AC
  • Current Rating: 20A
  • Dimensions: 6.4 in (162.6 mm) H x 1.5 in (38.1 mm) W x 4.13 in (104.90 mm) D
  • Standards: Industry Standard
  • Applications: Industrial and Commercial Panelboards, Switchboards, Feeder and Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -13 to 158 °F (-25 to 70 °C)
  • Phase: 1
  • Voltage: 277V
  • Amperage: 20A
  • AIC rating: 18kA @ 277V
  • Connection: I-Line Plug-In
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: F Frame
  • Trip Type: Thermal-Magnetic
  • Breaker Type: Molded Case
  • Mounting: Plug-In
  • Hz: 50/60 Hz
  • Enclosure: Molded Case
  • Standards: Industry Standard
  • Installation Type: Plug-In
  • Breaker Frame: F Frame


Product Identification
  • GTIN: 00785901368373