Mersen S218769 - DIN NH Standard fuse-link gG Size NH0 500VAC 250VDC 125A isolated tags Double indicator Body width 30 mm
Mersen

S218769

Alternate Item Number: NH0GG50V125-1


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Overview

The Mersen S218769 DIN NH0 gG fuse-link is a high-rupturing capacity (HRC) protective device designed for low-voltage industrial applications. Rated at 125A with a breaking capacity of 500VAC/250VDC, this fuse-link provides full-range protection against overloads and short-circuits. Its gG (general purpose) characteristic ensures it can interrupt any current surge from the lowest fusing current up to its rated breaking capacity, making it ideal for protecting cables, motors, transformers, and switchgear in demanding industrial environments. Key specifications include isolated tags for safe handling, a double indicator for clear visual status, and a compact 30mm body width compatible with standard NH0 fuse bases. The fuse-link dissipates 11.8W at rated current, ensuring thermal stability in continuous operation. With a package weight of 0.23kg and dimensions of 29.5mm width, it integrates seamlessly into DIN rail-mounted distribution boards and industrial control panels. Designed for IEC 60269 compliance, the S218769 is part of Mersen’s NH fuse system, a globally recognized standard for low-voltage protection. Its non-interchangeable design (handled by qualified professionals) prevents accidental overcurrent scenarios, enhancing operational safety. Typical applications span manufacturing plants, power distribution systems, renewable energy installations, and heavy machinery where reliable fault protection is critical. Mersen, a French manufacturer with over a century of expertise in electrical protection, ensures this fuse-link meets stringent international standards for durability and performance. The S218769 is distributed by Gross Automation (SKU: S218769, UNSPSC: 39121612) and is backed by Mersen’s global technical support network.
  • Rated 125A with 500VAC/250VDC breaking capacity
  • gG (general purpose) characteristic for full-range fault protection
  • Double indicator and isolated tags for safe handling
  • Compact 30mm body width fits standard NH0 fuse bases
  • 11.8W power dissipation at rated current

Specifications

AC Voltage Rating
500 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
Connection Type
Blade Contact
Current Rating
125A
DC Voltage Rating
250 V
Interrupt Rating
120 kA
Mounting
Clip
Mounting Type
Plug-in
Series
NH
Size
4.92 x 1.18 x 2.4 in
Size
125 x 30 x 61 mm
Size
NH0
Special Features
Dimensions according to DIN 43 620 Parts 1 to 4 Isolated metal gripping lugs (SGL) Double indicator 0 cadmium
Standard
VDE 0636 Part 201 IEC 60269-1 and -2
Type
IEC NH Fuse-Links
Type Of Indicators
Double indicator
Voltage Rating
500 VAC
Package Dimensions (L x W x H)
4.92 in x 1.18 in x 2.4 in
Package Dimensions (L x W x H)
125 mm x 30 mm x 61 mm
Package Weight (Imperial)
0.507 lb
Package Weight (Metric)
0.230 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.