Mersen G1054303 - DIN NH Standard fuse-link gG Size NH4a 690VAC 250VDC 800A live tags Center indicator Body width 100.10 mm
Mersen

G1054303

Alternate Item Number: NH4AGG69V800


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Overview

The Mersen G1054303 DIN NH Standard fuse-link (gG type) is a high-rupturing capacity (HRC) fuse designed for low-voltage industrial applications requiring robust overcurrent protection. Rated for 690V AC and 250V DC, this Size NH4a fuse-link delivers a full-range breaking capacity of 800A, making it ideal for protecting cables, motors, transformers, and other critical electrical equipment from overloads and short circuits. Key specifications include a power dissipation of 65W at rated current, a body width of 100.10mm, and live gripping lugs for secure contact. The center indicator provides clear visual status feedback, while the NH system’s plug-in design allows for quick replacement using standard LV HRC fuse pullers. Unlike lower-rated fuse-links, the G1054303 handles extreme short-circuit currents up to its breaking capacity without requiring additional protective devices, simplifying system design. Applications span industrial switchgear, motor control centers (MCCs), power distribution panels, and renewable energy systems where reliability and compliance with IEC 60269 standards are mandatory. The fuse-link’s non-interchangeable design (handled by qualified professionals) ensures proper current rating selection, reducing the risk of misapplication. With a weight of 2.58kg and a compact footprint, it fits standard NH fuse bases while meeting stringent safety and performance requirements. Mersen’s NH system, including this fuse-link, is trusted globally for its durability, precision, and adherence to international certifications. The G1054303 is manufactured in France and distributed by Gross Automation (SKU: G1054303, UNSPSC: 39121612).
  • Rated for 800A at 690V AC / 250V DC
  • Full-range breaking capacity (gG type) protects against overloads and short circuits
  • Center indicator for visual status verification
  • Live gripping lugs for secure contact in NH fuse bases
  • Power dissipation: 65W at rated current; body width: 100.10mm

Specifications

AC Voltage Rating
690 V
Amperage Rating
800 A
Application
gG: General purpose (protection of cables and LV-networks)
Body Material
Ceramic
Brand Name
Mersen
Connection
Plain Blades
Connection Material
Silver-Plated Copper
DC Voltage Rating
250 V
Interrupt Rating
120 kA
Mounting
Clip
Size
7.87 x 3.94 x 48.62 in
Size
200 x 100 x 1235 mm
Special Features
Dimensions in accordance with DIN 43 620 Live tags Middle indicator 0 cadmium
Standard
IEC/EN 60269-1 and -2 VDE 0636 Part 201
Type
IEC NH Fuse-Links
Type Of Indicators
Center indicator
Package Dimensions (L x W x H)
7.87 in x 3.94 in x 48.62 in
Package Dimensions (L x W x H)
200 mm x 100 mm x 1235 mm
Package Weight (Imperial)
5.688 lb
Package Weight (Metric)
2.580 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

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Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.