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Square D HDF36040 - Molded Case Circuit Breaker 40A 600V 3P

Square D
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Square D HDF36040 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 40A current rating and a 600V voltage rating, housed within a compact H-frame measuring 163 mm x 104 mm x 86 mm (H x W x D) and weighing 4.2 lb. The breaker utilizes a thermal-magnetic trip unit for long-time and instantaneous (LI) protection, offers an interrupting capacity of 18kA at 480V, and is compliant with UL, CSA, NEMA, and IEC 60947-2 standards. Its bolt-on, busbar connection terminals accept conductors from 14 AWG to 3/0 AWG, making it suitable for a range of commercial and industrial panelboard applications.

Key Features & Specifications
  • Type: HDF Series, Molded Case, Thermal-Magnetic Protection
  • Voltage Rating: 600V AC
  • Current Rating: 40A
  • Dimensions: 163 mm H x 104 mm W x 86 mm D (6.4 in x 4.09 in x 3.4 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Poles: 3
  • Connection: Bolt-On
  • Terminal Connection: Busbar Connection
  • Wire Size: 14 AWG to 3/0 AWG (Copper/Aluminum)
  • MCM Size: 14 AWG Min, 3/0 AWG Max
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: H
  • AIC Rating: 18kA @ 480V
  • Temp Rating: -2 to 70 °C (28 to 158 °F)
  • Certification: UL, CSA, NOM
  • Weight: 4.2 lb


Product Identification
  • UPC: 785901682509
  • GTIN: 00785901682509