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Square D HC4SN - Molded Case Circuit Breaker 400A (I-Line)

Square D
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Square D HC4SN is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 400A current rating and is engineered for installation within HCN and HCM series distribution boards, with compact physical dimensions of 78.49 mm depth by 112.78 mm width and a weight of 3.631 lb. The breaker is constructed for use with copper or aluminum conductors ranging from AWG 14 to 350 kcmil and complies with UL and CSA certification standards as well as RoHS and REACh environmental directives. This I-Line family component is typically applied in panelboard assemblies for commercial and industrial facilities requiring robust electrical protection.

Key Features & Specifications
  • Type: HCJ molded case circuit breaker for I-Line panelboards
  • Current Rating: 400A
  • Dimensions: 3.09 in (78.49 mm) Depth x 4.44 in (112.78 mm) Width
  • Weight: 3.631 lb
  • Standards: RoHS, REACh
  • Certification: UL, CSA
  • Wire Size: AWG 14 to 350 kcmil, Copper or Aluminum
  • Panel Type: Compatible with HCN and HCM distribution boards
  • Family: I-Line
  • Country of Origin: United States
  • Section: Panelboard Assemblies


Product Identification
  • UPC: 785901506010
  • GTIN: 00785901506010