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Thomas & Betts 3999 - Industrial Fuse 400A 600V

Thomas & Betts
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Thomas & Betts 3999 is a heavy-duty industrial fuse designed for overcurrent protection in high-power electrical distribution systems. It is rated for 600V AC/DC and carries a current rating of 400A, providing robust fault interruption capabilities. Constructed with a durable, non-ventilated metal body and weighing 5.19 lb, this fuse is built for reliable performance in demanding environments. The component complies with UL and CSA standards, ensuring adherence to North American safety and performance requirements. Typical applications include motor control centers, switchboards, and feeder circuits in manufacturing plants and commercial facilities.

Key Features & Specifications
  • Type: Industrial fuse, non-ventilated metal construction
  • Voltage Rating: 600V AC/DC
  • Current Rating: 400A
  • Weight: 5.19 lb
  • Country of Origin: Viet Nam
  • Standards: UL, CSA
  • Applications: Overcurrent protection in motor control centers, switchboards, feeder circuits


Product Identification
  • UPC: 78621003999
  • GTIN: 00786210039992