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Mersen B212107 - NH plastic base Size NH2 1000VAC 1000VDC 400A 3-Pole Screw Connection Screw PP Type
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Mersen B212107 NH plastic base Size NH2 1000VAC 1000VDC 400A 3-Pole Screw Connection Screw PP Type

Alternate Item Number: BB23PP


Documents & Media
Specification Sheet

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen B212107 is a 3-pole NH plastic base fuse holder designed for industrial overcurrent protection. Rated for 400A continuous current, this NH2 size base supports NH fuse-links up to 400A with a maximum operating voltage of 1000VAC and 1000VDC. The screw connection design ensures stable electrical contact and secure mounting, while the plastic base construction provides durability and electrical insulation. This fuse holder is optimized for close mounting in parallel rows, maximizing panel space efficiency. Each three-pole base includes two phase-partition walls for enhanced safety and electrical segregation between poles. The contact springs are silver-plated electrolytic copper, formed from a single piece and reinforced with resilient captive steel springs to resist high thermal stress and maintain long-term performance. The B212107 supports NH fuse-links with striker, enabling integration with a microswitch (sold separately) for blown fuse signaling or fuse absence detection. With an IP20 rating, it protects against solid objects greater than 12.5mm. The base is designed for installation using M8-10 screws with a recommended tightening torque of 27-32Nm. Standard cable terminals accept M10 conductors with a maximum tightening torque of 32Nm. The power acceptance rating for this size 2 base is 45W.
  • 3-pole NH2 plastic fuse base rated 400A, 1000VAC/VDC
  • Screw connection with M10 cable terminals (max torque 32Nm)
  • Includes two phase-partition walls for electrical segregation
  • Supports NH fuse-links with striker for microswitch integration
  • IP20 protection against solid objects >12.5mm

Specifications

AC Voltage Rating
1000 V
Amperage Rating
400 A
Application
For fuse-links with rated voltages up to 1000VAC and 1000VDC
Brand Name
Mersen
Connection
Screw
Connection Type
Screw Connection
Current Rating
400A
DC Voltage Rating
1000 V
IP Rating
IP20
Material
Plastic (PP)
Mounting
Screw
Mounting Type
Panel Mount
Number of Poles
3
Poles
3-pole
Series
NH Plastic Base Fuse Holder
Size
3.5 x 7.52 x 8.86 in
Size
89 x 191 x 225 mm
Size
NH2
Special Features
Polyamide insulating bases Silver-plated contacts High-pressure spring contacts Screw or rail mounting Connecting cable: 50mm Multipolar bases possible by direct linkage in 00 size and with separator accessory in sizes 0, 1, 2 and 3 Variety of options for protecting active parts through use of accessories: separating plates, separator, cover shields and fuse cover Dual cable-connection system on 00 size: by screw or clamp
Standard
IEC 60269 Compliance Dimensions in accordance with DIN 43620 DIN VDE 0636-2, 0636-21
Type
IEC NH Fuse Bases
Voltage Rating
690 VAC
Voltage Rating
1000VAC/1000VDC
Package Dimensions (L x W x H)
3.5 in x 7.52 in x 8.86 in
Package Dimensions (L x W x H)
89 mm x 191 mm x 225 mm
Package Weight (Imperial)
3.858 lb
Package Weight (Metric)
1.750 kg
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Frequently Asked Questions

What is the rated voltage for these NH fuse bases?

The fuse-links are rated for voltages up to 1000 VAC and 1000 VDC.

What is the ampere range for the NH plastic bases?

The ampere range for these bases is from 160 A to 630 A.

What sizes are available for the NH plastic bases?

NH plastic bases are available in sizes 00, 0, 1, 2, 3, and 4.

How many poles can these NH fuse bases have?

These bases are available in 1-pole, 2-poles, 3-poles, and 4-poles configurations.

What type of contacts are used in the NH plastic bases?

The bases feature stable silver-plated contact springs made of electrolytic copper.

Can a microswitch be used with these NH fuse bases?

A microswitch can be used with NH fuse-links with a striker, but not with indirect touch protection bases.

What is the rated impulse withstand voltage for these bases?

The rated impulse withstand voltage is 6kV for sizes 00 and 8kV for sizes 0-4.

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.