Square D JJN400 - Class T Fuse 400A 300V
Square D JJN400 - Class T Fuse 400A 300V
Square D JJN400 - Class T Fuse 400A 300V
Square D JJN400 - Class T Fuse 400A 300V

Square D JJN400 - Class T Fuse 400A 300V

Square D
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Square D JJN400 is a Class T low-voltage fuse designed for high-current circuit protection in industrial power distribution systems. It provides reliable 400A current interruption with a 300V AC voltage rating, housed in a durable 489 mm (19.25 in) long body with a robust construction for demanding environments. This fuse complies with relevant industry standards for safety and performance, making it suitable for protecting feeders, mains, and heavy machinery in commercial and industrial facilities.

Key Features & Specifications
  • Type: Class T, JJN, fast-acting low-voltage fuse
  • Voltage Rating: 300V AC
  • Current Rating: 400A
  • Dimensions: 489 mm (19.25 in) Length
  • Standards: UL Listed, CSA Certified
  • Applications: Feeder and mains protection, industrial power distribution
  • Family: Class T
  • Country of Origin: United States
  • Weight: 1 lb


Product Identification
  • UPC: 785901119067
  • GTIN: 00785901119067