Littelfuse 39018R2B5.5 is a medium voltage R-rated fuse designed for high-current circuit protection in industrial power systems. This bolt-in fuse features a 5500V voltage rating and 390A current rating, with a robust 2-barrel construction and 3-inch diameter for reliable performance. It meets R-class standards with an 80kA interrupting capacity at 5.5kV, ensuring protection against short circuits in demanding applications. The fuse is engineered for medium voltage switchgear, motor starters, and transformer protection in utility and industrial environments.
Key Features & Specifications
Type: R-rated medium voltage current-limiting fuse
Voltage Rating: 5500V AC
Current Rating: 390A
Dimensions: 3" diameter
Standards: R-class rated
Applications: Industrial power systems, switchgear, motor protection