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Cutler Hammer HFD1040 - Molded Case Breaker 40A 277V AC

Cutler Hammer
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Cutler Hammer HFD1040 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 for single-phase applications, housed within a compact F-frame measuring 3.38 in (L) x 6 in (H) x 1.38 in (W) and weighing 4 lb. The breaker is UL Listed and employs a thermal-magnetic trip unit with long-time and instantaneous (LI) functions, offering an interrupting capacity of 65kA at 277V and an operational temperature range of -25°C to 70°C (-13°F to 158°F). Its bolt-on connection and robust construction make it suitable for panelboards and switchboards requiring dependable circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 277V AC
  • Current Rating: 40A
  • Dimensions: 3.38 in x 6 in x 1.38 in (Length x Height x Width)
  • Weight: 4 lb
  • Standards: UL Listed
  • Applications: Industrial & Commercial Panelboards, Switchboards
  • Switch Type: Circuit Breaker
  • Configuration: Single-Pole (1P)
  • Coil Voltage Maximum: Not Applicable
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Shipping Dimensions: See Product Dimensions
  • Phase: 1
  • Voltage: 277V AC
  • Amperage: 40A
  • AIC Rating: 65kA @ 277V
  • Connection: Bolt-On
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous Trip (LI)
  • Frame Size: F Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Compatible with Standard Panelboards
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not Applicable
  • Control Voltage Maximum: Not Applicable
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: Standard 50/60 Hz
  • Phase Connection: Single-Phase
  • Standards: UL
  • Compatible Frames: F Frame Series
  • Installation Type: Fixed
  • Family: Series C
  • Country of Origin: Dominican Republic


Product Identification
  • UPC: 786679175309
  • GTIN: 00786679175309