Mersen Fuses

Passive Components > Mersen

With over 135 years of experience and a presence in 35 countries, Mersen is a global leader in electrical power and advanced materials for high-tech industries. Operating more than 50 industrial sites and 16 R&D centers, Mersen Electrical Power offers an extensive range of products for electrical protection and control, as well as solutions for power management applications. Collaborating with customers worldwide, Mersen designs and delivers customized solutions for key markets, including commercial, industrial, renewable energy, power electronics, and E-mobility. Mersen’s mission is to enhance the safety and reliability of customer applications.

Formerly known as Ferraz-Shawmut, Mersen is renowned for its innovative fuse technology, including the Amp-Trap® current-limiting fuse, Amp-Trap 2000® time-delay fuses, and SmartSpot® open-fuse indicator technology. Mersen continues to lead in electrical protection, serving sectors such as energy, transportation, electronics, chemicals, pharmaceuticals, and process industries.

Mersen’s advanced manufacturing expertise includes power transfer for rail vehicles, electronic systems for energy management, wire management, high-temperature solutions, anticorrosion and process equipment, electrical solutions for motors and generators, surge protection, low-voltage disconnect switches, high-power switches and contactors, cooling of power electronics, bus bars, and more.

HelioProtection® Fuses are a specialized line of photovoltaic (PV) fuses designed by Mersen to safeguard solar energy systems from overcurrent, ground faults, and line faults. These fuses are engineered to handle the unique requirements of solar power installations, offering reliable protection for both off-grid and grid-tied photovoltaic systems.

Key Features:

1. High Voltage Rating: HelioProtection fuses are rated up to 1500VDC, making them suitable for modern, high-voltage solar applications.

2. Low Fault Current Protection: These fuses are designed to safely interrupt low fault currents typical in PV arrays, such as reverse currents and multiarray faults. The fuses have a low minimum breaking capacity, usually 1.35 times the rated current.

3. Durable Construction: The fuses are designed to withstand harsh environmental conditions and cyclical loads, making them highly durable. They perform well under constant temperature fluctuations and extreme thermal conditions.

4. Variety of Terminals: HelioProtection fuses are available with standard ferrule terminals, as well as Crimp Cap terminals, which allow for solderless wire-to-fuse connections. This feature is particularly useful in overmold encapsulation applications, improving system integrity.

5. Global Certifications: These fuses comply with several international standards, including UL, CSA, and IEC, ensuring their suitability for use in solar installations worldwide.

6. Multiple Amperage Options: The HelioProtection line supports a wide range of amperages, from small to high current applications, making it versatile for different levels of solar installations.

Applications:

• Photovoltaic String/Array Protection: Ideal for protecting PV strings and arrays in solar power systems.
• Combiner Boxes: Used in combiner boxes, which consolidate multiple solar panel outputs.
• Inverters: Provides overcurrent protection for solar inverters.
• Battery Charge Controllers: Ensures the safety of battery systems in off-grid and grid-tied applications.

Technical Specs:

• Voltage Rating: Up to 1500VDC
• Amperage Range: Typically 4A to 80A
• Breaking Capacity: Designed to handle up to 10kA at 1000VDC
• Certifications: UL Listed, IEC 60269-6, CE, and CSA Component Certified

HelioProtection® fuses are trusted for their performance and reliability, helping extend the life and safety of solar energy systems in both residential and commercial installations.

Some of the Mersen products offered include:

• Surge protection
• Lightning protection
• Power monitoring
• Bus bars
• Fuses and fuse systems
• Low-voltage switches
• Heat sinks
• Wiring management
• Engineered solutions

Mersen Fuses

Mersen products prevent the destruction of industrial and commercial electrical equipment, ensure an uninterrupted power supply, and help to stabilize the electrical network.

UL/CSA Low voltage general purpose fuses and fusegear

Midget fuse links

Mersen offers the broadest selection of Supplemental and Midget fuses in both time-delay and fast-acting. Mersen’s international range of midget dimension fuses offers you all the protection you require, all within a small footprint.

Blades fuse links

Mersen’s bladed fuses cover a complete range of applications and a complete range of electrical protection needs.

Ferrule fuse links

Mersen’s ferrule fuses are engineered for overcurrent protection and meet the most popular protection priorities.

Fusegear

Mersen offers a comprehensive line of North American (UL and CSA) fusegear.

Distribution blocks

Mersen power distribution blocks provide a safe and easy method of splicing cables, splitting primary power into secondary circuits and fulfilling requirements for fixed junction tap-off points.

Miniature fa sa fuses and fusegear

Mersen provides a comprehensive line of current-limiting fuses (low voltage, general purpose, medium voltage, semiconductor, miniature and glass, and special purpose) and accessories, fuse blocks and holders, power distribution blocks, low voltage disconnect switches. 

Miniature ul/csa fuses and fusegear

Mersen miniature fuses provide maximum protection in minimum space.

PV fuses and fusegear

Mersen HelioProtection® PV products have been tested and certified to the latest industry standards for use in photovoltaic applications and guarantee the level of performance required by the PV industry.

• HP6M Fuse Series (600VDC): Designed to protect PV systems from low fault currents, the HP6M fuse withstands constant temperature and current cycling, enhancing system longevity.
• HP15P40 Solar Fuses (1500VDC): Handles higher amperage demands, with a design that meets the harsh conditions of high-amperage PV circuits.

Low voltage disconnect switches

Mersen’s global range of low voltage disconnect switches encompasses both UL and IEC standard products for AC and DC applications. Full line of accessories accommodates virtually any application. 

Bussmann, Mersen (Ferraz Shawmut), Littelfuse DC Fuses Cross Reference

A DC fuse selection chart featuring options like fast-blow fuses, slow-blow fuses, specialty fuses, and general-purpose fuses from leading manufacturers, including Bussmann, Mersen/Ferraz Shawmut, and Littelfuse.