Mersen N218788 - NH fuse-bases are available for delivery in single-pole and three-pole designs and can be closely mounted in parallel rows. Each three-pole base is upplied with two phase-partition walls. NH-ISO plugon covers which clip onto the contact springs can also be supplied for these bases. Ceramic fuse-bases in sizes 00 to 3 are provided with a single-part steatite base, while size 4 has a metal baseplate with 2 ceramic bases. Plastic fuse-bases have a single-part plastic base. The stable silver-plated contact springs are made of electrolytic copper and formed from one piece. Separate springing is provided by highly resilient captive steel springs, making the contact invulnerable to high thermal stress. Size 4 NH fuse-bases are designed for size 4 fuse-links with 8 mm contact blades. Size 4a fuse-bases are designed for size 4a fuse-links with 6 mm contact blades 0 mount 0 connector single NH1 cable terminal .
Mersen

N218788

Alternate Item Number: 3605340240375

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Minimum Qty: 30

Multiplier: 30

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Overview

Mersen NH fuse-bases (SKU: N218788) deliver reliable, high-performance protection for low-voltage industrial electrical systems. Available in sizes 00 to 4a, these fuse-bases support single-pole and three-pole configurations, enabling flexible deployment in parallel rows or DIN rail installations. Three-pole bases include phase-partition walls for enhanced safety and phase isolation, while NH-ISO plug-on covers (sold separately) provide additional protection against accidental contact. The fuse-bases are offered in multiple materials: ceramic bases (sizes 00-3) feature a single-part steatite construction for superior heat resistance, size 4 uses a metal baseplate with dual ceramic bases for high-current applications, and plastic bases (sizes 00-4) provide lightweight, cost-effective solutions. Contact springs are precision-engineered from electrolytic copper with silver plating for maximum conductivity and corrosion resistance. Separate springing is achieved via highly resilient captive steel springs, ensuring consistent contact pressure even under extreme thermal stress. Size-specific compatibility includes: sizes 00-3 for 8mm contact blades, size 4 for 8mm blades with 1250A capacity, and size 4a for 6mm contact blades. Connection options vary by model: screw terminals for high-reliability installations, clamp terminals for quick assembly, and DIN rail mounting for space-constrained applications. Rated currents range from 160A (size 0) to 1250A (size 4), with power acceptance up to 12W for plastic bases. Ideal for industrial environments, Mersen NH fuse-bases are specified in IEC NH low-voltage fuse systems and comply with DIN VDE 0636-2 standards. Applications include motor protection, transformer circuits, distribution panels, and renewable energy systems where dependable overcurrent protection is critical. The modular design allows for easy upgrades or replacements without system redesign. Backed by Mersen's engineering expertise, these fuse-bases combine durability, precision, and compliance to deliver uninterrupted protection in demanding electrical infrastructures.
  • Available in sizes 00 to 4a with ceramic, steatite, metal, or plastic construction
  • Single-pole and three-pole designs with phase-partition walls for safety
  • Silver-plated electrolytic copper contact springs with captive steel springing
  • Multiple connection options: screw, clamp, or DIN rail mounting
  • Rated currents from 160A to 1250A with power acceptance up to 12W

Specifications

Application
NH fuse-bases are designed for fuse-links with rated voltages up to 690VAC and 440VDC.
Brand Name
Ferraz Shawmut
Connection Type
Single NH1 cable terminal
Material
Ceramic, Steatite, Metal, Plastic
Mounting Type
Parallel rows, Mounted
Poles
Single-pole, Three-pole
Series
NH Fuse-Bases
Size
00 to 4a
Standard
IEC 60269 Compliance Dimensions in accordance with DIN 43620
Type
IEC NH Fuse Bases
Voltage Rating
690 VAC
Package Dimensions (L x W x H)
1.25 IN x 0.65 IN x 0.75 IN
Package Dimensions (L x W x H)
3.175 cm x 16.51 mm x 19.05 mm
Package Weight (Imperial)
0.359 L
Package Weight (Metric)
0.163 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.