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Approvals & Standards

  • Amp-Trap: UL File E93367
  • 9F60: UL File E191980

Key features & benefits

Mersen R-Rated fuses are current-limiting, high interrupting rating fuses intended for the short circuit protection of medium voltage motors and motor controllers. R-Rated fuses are back-up fuses that have a minimum interrupting rating, and must be coordinated with overload relays in combination motor starters. The motor starter manufacturer generally specifies the R-Rated fuse size. These fuses come with a 3 (size D) or 4 (size E) inch diameter barrels with ferrules and are mounted in spring reinforced clips

More specifications


  • Short circuit protection of medium voltage motors and motor controllers

Product Specifications

Item Number


Item Description (ERP)

MSF EJ-2 F 5.08KV 3R  

Short Description

Medium Voltage Fuse 5080V 3R R-Rated Ferrule Mount Striker LJN Series  



Rated voltage AC UL

5080   V


50/60   Hz





AC Max I.R./Breaking Capacity: I1

50   kA

Connection/Terminal Material

Silver-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

8   lb

Product Diameter

3.000   in

Product Width

3.00   in

Product Length

15.97   in

Product Height

3.00   in

Sell Pack Quantity

1   Each

Sell Pack Weight

8.4   lb

Sell Pack Width

4.00   in

Sell Pack Length

17.75   in

Sell Pack Height

4.00   in