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Mersen fuses for the protection of transformers and distribution lines deliver overload and short circuit protection, and are designed to withstand the transformer magnetizing inrush current.

Mersen's Helioprotection line of fuses are engineered and designed specifically for the protection of strings and combiner boxes in photovoltaic systems.

The offering encompasses a complete range of NH Switch Fuse Disconnectors and any class of NH power fuses: gG, aM, gTr.

Mersen's Amp-Trap Round Body high speed fuses product line encompasses a wide variety of voltage ratings and performance, making it ideal for protecting a wide variety of power electronic applications.

Mersen Protistor® square body fuses are available in eight different body sizes, each size having more than seven worldwide acceptable mounting styles, provide maximum flexibility in equipment design and ultimate protection.

Tri-Onic RK5 current-limiting time-delay fuses are engineered for overcurrent protection of motors, transformers, service entrance equipment, feeders and branch-circuits.

Significantly more current-limiting than Class RK5, K and H fuses, Mersen’s Class RK1 fuses are ideal for upgrading your existing feeder and branch circuits to arc flash category “0”.

Mersen’s TPMOV® technology eliminates common failure modes that occur in the field with standard metal oxide varistors.

Designed with the industry leading Mersen TPMOV® Technology, NEMA UL SPD meets requirements for UL1449 5th Edition.

Surge-Trap® Modular Surge Protective Device (SPD) is a no-fuse, fail-safe surge suppressor featuring Mersen’s patented TPMOV® technology inside. UL 1449 5th Edition approved, it is DIN-rail mountable featuring a fail-safe self-protected design, visual indicator, and a small footprint.