Mersen N219271 - The NH system is classified among plug-in fuse systems and is composed of: • fuse-base (possibly including terminal covers and phase barriers) • fuse-link with blade contact • fuse-link replacement device (LV HRC fuse puller) Since the design of this system cannot guarantee non-interchangeability of rated current, it must be handled by a qualified professional. 690 Volts 500 Amps gG NH3 with striker series.
Mersen

N219271

Alternate Item Number: 8430399012537

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Overview

The Mersen NH3 690V 500A gG Plug-in Fuse System (SKU: N219271) is a high-current industrial fuse solution designed for demanding applications requiring robust overcurrent protection. This NH-series system includes a fuse-base with terminal covers and phase barriers, a fuse-link with blade contact, and an LV HRC fuse puller for safe replacement. Rated for 690V and 500A, it meets IEC NH fuse standards and is classified under gG for general-purpose protection. The striker mechanism provides visual indication of fuse operation, enhancing safety during maintenance. The system is designed for professional use and must be installed by qualified personnel to ensure proper operation and compliance with electrical standards. With a maximum breaking capacity of 80kA at 690V, this fuse system is ideal for heavy-duty industrial environments such as motor control centers, switchgear, and distribution panels. The NH3 configuration supports up to 500A continuous current with a power dissipation of 21.5W at rated current, ensuring reliable performance under high-load conditions. Compatible with NH fuse-links size 3, this system offers a compact footprint with dimensions tailored for industrial mounting. The fuse-base is available in open design or with touch protection, providing flexibility for different installation requirements. Trust Mersen’s decades of expertise in low-voltage fuse systems for a solution that meets stringent industrial safety and reliability standards.
  • Rated for 690V and 500A continuous current
  • gG classification for general-purpose overcurrent protection
  • Striker mechanism for visual indication of fuse operation
  • Includes fuse-base, fuse-link with blade contact, and LV HRC fuse puller
  • Maximum breaking capacity of 80kA at 690V
  • Designed for NH fuse-links size 3 (400-500A range)
  • Available in open or touch-protected fuse-base configurations
  • Power dissipation: 21.5W at 500A rated current
  • Compact dimensions optimized for industrial mounting
  • Must be installed by qualified professionals per manufacturer guidelines

Specifications

Amperage Rating
500 A
Application
gG: general purpose cable and line protection
Brand Name
Ferraz Shawmut
Connection
Blade
Connection Type
Plug-in
Current Rating
500 A
Interrupt Rating
80 kA
Series
NH
Series
NH3
Size
NH3
Special Features
Dimensions according to DIN 43 620 Parts 1 to 4 Lead free contact blades 0% cadmium
Standard
VDE 0636 Part 201 IEC 60269-1 and -2
Type
IEC NH Fuse-Links
Type Of Indicators
Striker
Voltage Rating
690 VAC
Package Dimensions (L x W x H)
5.91 IN x 2.28 IN x 2.01 IN
Package Dimensions (L x W x H)
15.0114 cm x 5.7912 cm x 5.1054 cm
Package Weight (Imperial)
1.910 L
Package Weight (Metric)
0.866 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.