Medium Voltage IEEE Fuses

General Purpose Bolt-On Fuses for Transformer Protection

15.5kV Bolt-On Mount Transformer Fuses

Mersen fuses for the protection of transformers and distribution lines deliver overload and short circuit protection. These current-limiting fuses will melt at current that can be as low as 1.7 times the fuse current ratings up to its maximum interrupting rating. These fuses are designed to withstand the transformer magnetizing inrush current. They are single, double, triple or quadruple barrels 3 inch diameter (size D) with end mounts designed for bolting directly to equipment bus or terminal pads.



  • UL listed for compatibility with UL listed equipment.
  • Bolt-In mounting for direct connection to bus or terminals.
  • Current-limiting for superior equipment protection.
  • Non-venting for silent operation
  • Metal embossed catalog number and manufacturing date for lasting identification.
  • Outdoor usage for the 9F62.
  • Blown-fuse indicator to give positive identification of open fuse.
  • Amp trap: 2 lb tripped force - 0.50 Inch
  • 9F62: 0.125 lb tripped force – 0.20 Inch


  • Voltage Range (VAC) 15.5 kV VAC
  • Ampere Range (A) 200 to 300 A
  • I.R. AC (kA) 50 kA
  • Speed / Characteristic E-Rated
  • Mounting Bolted
  • Connection Terminal Type Blade
  • Body Style Ferrule
  • Body Material GMG
  • Materials Contact Silver-Plated Copper
    Tin-plated Copper
  • Standards UL Listed to
  • Application Protection for 15.5kV transformers or distribution systems.
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services
  • UL File Card E143362 JEEG.E143362


  • 9F62KED300
  • A155B2D0R0-200E
  • A155B3D0R0-300E


  • CAD Drawings

    • Drawing A155B2D0R0-200E :   PDF (53 KB)
    • Drawing A155B3D0R0-300E :   PDF (55 KB)
    • Drawing 2B628003 :   PDF (109 KB)



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