Press Release
Mersen Expands Line of Amp-Trap® 15.5kV e-Rated Bolt-In Transformer Fuses

Mersen Expands Line of Amp-Trap® 15.5kV e-Rated Bolt-In Transformer Fuses

Now available from 10E-300E

NEWBURYPORT, MA (October 27, 2023) – Mersen is excited to announce the expansion of its line of Amp-Trap 15.5kV E-rated bolt-in transformer fuses. By expanding the coverage of the bolt-in mount fuses at the 15.5kV voltage class to 10E-300E ratings, Mersen can now provide superior protection to a wider range of applications.

Mersen’s Amp-Trap E-rated fuses have been used extensively and are trusted to protect gear and transformers. Because of the simplicity and ruggedness of a bolted connection, there is an industry trend to increasingly utilize bolt-in fuses in medium voltage equipment. With this expanded range, OEMs can incorporate these UL listed, current-limiting fuses directly onto bus or terminal connections. This provides a simpler design with fewer components as well as a visibly secure connection.

Mersen’s Amp-Trap E-Rated fuses are designed to withstand the transformer magnetizing inrush current while delivering overload and short circuit protection. The expanded 15.5kV range includes single, double, and triple barrels, all with a 3-inch diameter (size D). End mounts are designed for bolting directly to equipment bus or terminal pads.

For more information about Mersen Amp-Trap 15.5kV E-rated bolt-in transformer fuses, visit the product page. For more information about Mersen, visit

Mersen is a global expert in electrical power and advanced materials for high-tech industries, with over 135 years of experience, and more than 50 industrial sites and 16 R&D centers in 35 countries. Mersen Electrical Power provides a broad portfolio of products in electrical protection and control and offers solutions for power management applications. Mersen Electrical Power teams work with customers worldwide to design and to deliver customized solutions and key products into various key markets such as commercial, industrial, renewable energies, power electronics, and E-mobility. Mersen’s mission is to make customers’ applications safer and more reliable. For more information, visit
Appleton LED Luminaire for Oil Refineries, Chemical Processing and Other Hazardous Industrial Locations
Newsletter Signup