Mersen X1208371 - DIN NH Standard fuse-link gG Size NH000 400VAC 125A Double indicator Body width 21mm
Mersen

X1208371

Alternate Item Number: NH000GG40V125


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Overview

The Mersen X1208371 DIN NH Standard fuse-link (gG type) is a high-reliability, plug-in fuse designed for industrial and commercial electrical protection. Rated at 400V AC and 125A, this NH000 size fuse-link features a blade contact connection and a 21mm body width, making it compatible with standard NH fuse bases. The double indicator design provides clear visual status indication, while the isolated gripping lugs ensure safe handling during installation and replacement. As a full-range breaking capacity fuse-link (gG), it protects cables and equipment from overloads and short-circuit currents up to its rated breaking capacity, eliminating the need for additional protective devices in many applications. The power dissipation at rated current is 11.8W, well below the maximum values specified by IEC 60269, ensuring efficient operation with minimal heat generation. Manufactured by Mersen in France, this fuse-link is engineered for use in low-voltage electrical systems where dependable overcurrent protection is critical. Its compact NH000 size makes it ideal for space-constrained installations, while the plug-in design simplifies maintenance and replacement. Suitable for protecting motors, transformers, and distribution circuits in industrial facilities, commercial buildings, and infrastructure projects.
  • Rated 400V AC, 125A with 11.8W power dissipation at rated current
  • NH000 size with 21mm body width for compact installations
  • Double indicator design for clear visual status indication
  • Full-range breaking capacity (gG) protects against overloads and short circuits
  • Plug-in blade contact compatible with standard NH fuse bases

Specifications

AC Voltage Rating
400 V
Amperage Rating
125 A
Application
gG: general purpose cable and line protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Plain Blades
Connection Material
Silver-Plated Copper
Interrupt Rating
100 kA
Mounting
Clip
Size
3.09 x 0.83 x 2.07 in
Size
78.5 x 21 x 52.5 mm
Special Features
Dimensions according to DIN 43 620 Parts 1 to 4 Non-isolated gripping lugs Double indicator Lead free contact blades 0 cadmium
Standard
VDE 0636 Part 201 IEC 60269-1 and -2
Type
IEC NH Fuse-Links
Type Of Indicators
Double indicator
Package Dimensions (L x W x H)
3.09 in x 0.83 in x 2.07 in
Package Dimensions (L x W x H)
78.5 mm x 21 mm x 52.5 mm
Package Weight (Imperial)
0.293 lb
Package Weight (Metric)
0.133 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.
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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.