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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 18R W/ IND  


Medium Voltage Fuse 5080V 18R R-Rated Ferrule Mount Striker MJD Series  

EAN/UPC code


Rated voltage AC UL

5080   V





AC Max I.R./Breaking Capacity: I1

50   kA

Indication System


Indication System Type

Visual Indicator  

Contact materials

Silver-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

7.2575   kg

Product Diameter

76.2   mm

Product Length

405.6   mm

Sell Pack Quantity

1   Each

Sell Pack Weight

7.6203   kg

Sell Pack Width

203.2   mm

Sell Pack Length

454.2   mm

Sell Pack Height

98.6   mm