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Littelfuse L50QS400 - High-Speed Fuse 400A 500V

Littelfuse
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Littelfuse L50QS400 is a high-speed semiconductor fuse designed for the protection of power diodes, SCRs, and other sensitive power electronic devices. This round body fuse is rated for 500V AC/DC with a continuous current rating of 400A and an interrupting capacity of 200kA at 500V, ensuring robust fault clearing. The fuse features a single barrel construction with a 1.5-inch diameter, weighing 2 lb, and is part of the Powr-Speed family. It complies with industry standards for semiconductor protection, offering low I²t and arc voltage for superior circuit isolation. Typical applications include variable speed drives, UPS systems, and power conversion equipment in industrial environments.

Key Features & Specifications
  • Type: L50QS Series – High-Speed Semiconductor Fuse, Round Body
  • Voltage Rating: 500V AC/DC
  • Current Rating: 400A
  • Dimensions: 1.5-inch diameter
  • Standards: Semiconductor protection compliance
  • Applications: Power diodes, SCRs, variable speed drives, UPS systems, power conversion equipment
  • Barrels: 1
  • AIC rating: 200kA@500V
  • Weight: 2 lb


Product Identification
  • UPC: 079458860085