Mersen N205770 - DIN NH Standard fuse-link gG Size NH000 500VAC 250VDC 4A isolated tags Double indicator Body width 21mm
Mersen

N205770

Alternate Item Number: NH000GG50V4-1


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Specification Sheet

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Overview

The Mersen N205770 DIN NH000 gG fuse-link is a high-rupturing capacity (HRC) fuse designed for industrial and commercial electrical systems requiring reliable overcurrent protection. This fuse-link is rated for 500VAC and 250VDC, with a nominal current of 4A, making it suitable for low to medium power applications. The NH000 size ensures compatibility with standard NH fuse bases, while the double indicator and isolated gripping lugs provide clear visual status indication and safe handling during installation or replacement. Key specifications include a body width of 21mm, optimized for compact installations where space is a premium. The gG (full-range breaking capacity) classification means this fuse can interrupt any current surge from the lowest fusing current up to its breaking capacity, offering comprehensive protection for cables, wiring, and sensitive equipment. The fuse-link is engineered to withstand electrodynamic forces during short-circuit events, ensuring long-term reliability in harsh industrial environments. Applications include motor control centers, distribution boards, industrial machinery, and renewable energy systems where precise overcurrent protection is critical. The Mersen NH system is a plug-in fuse system composed of the fuse-base, fuse-link with blade contacts, and a replacement device (LV HRC fuse puller). Due to the design, non-interchangeability of rated current must be managed by qualified professionals to prevent misapplication. The N205770 is manufactured by Mersen, a global leader in electrical protection and power management solutions, ensuring compliance with IEC standards and delivering the durability and performance expected in industrial applications.
  • Rated for 500VAC and 250VDC operation
  • Nominal current: 4A (gG full-range breaking capacity)
  • NH000 size with 21mm body width for compact installations
  • Double indicator and isolated gripping lugs for safe handling
  • Compatible with standard NH fuse bases and replacement devices

Specifications

AC Voltage Rating
500 V
Amperage Rating
4 A
Application
gG: general purpose cable and line protection
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
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 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)
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)
0.287 lb
Package Weight (Metric)
0.130 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.

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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.