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Mersen B227977 - DIN NH Standard fuse-link aM Size NH2 690VAC 400A live tags Double indicator Body width 52 mm
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Mersen B227977 DIN NH Standard fuse-link aM Size NH2 690VAC 400A live tags Double indicator Body width…

Alternate Item Number: NH2AM69V400


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Specification Sheet

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Overview

The Mersen B227977 is a DIN NH Standard fuse-link, specifically an aM type, designed for robust protection in industrial electrical systems. Rated for 690VAC and 400A, this NH2 size fuse-link features double indicators for clear status indication and live gripping lugs for safe handling. Its body width is 52 mm. As part of the NH system, it's a plug-in fuse system requiring a fuse-base, fuse-link with blade contact, and a fuse-link replacement device. Due to the system's design, which does not guarantee non-interchangeability of rated current, handling must be performed by a qualified professional. The 'aM' designation signifies partial-range breaking capacity, making these fuse-links ideal for motor circuit protection. They are strongly current-limiting and exhibit low power losses. These fuse-links interrupt currents from 6.3 times the nominal current (In) up to their maximum breaking capacity, thus serving exclusively for short-circuit protection. For overload protection, they must be paired with other switchgear. The rated current of these fuse-links can be set equal to the motor's nominal current. Manufactured by Mersen in France (FR), this fuse-link offers reliable performance for critical applications.
  • Mersen NH2 aM fuse-link for motor circuit protection
  • Rated 400A, 690VAC with double indicator and live gripping lugs
  • Size NH2, 52 mm body width
  • Partial-range breaking capacity for short-circuit protection
  • Requires qualified professional handling due to NH system design

Specifications

AC Voltage Rating
690 V
Amperage Rating
400 A
Application
aM: Partial purpose, motor circuit protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Plain Blades
Connection Material
Silver-Plated Copper
Current Rating
400 A
Interrupt Rating
80 kA
Mounting
Clip
Size
NH2
Size
5.91 x 2.05 x 2.91 in
Size
150 x 52 x 74 mm
Special Features
Dimensions according to DIN 43 620 parts 1 to 4 Non-isolated gripping lugs 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
690 VAC
Package Dimensions (L x W x H)
5.91 in x 2.05 in x 2.91 in
Package Dimensions (L x W x H)
150 mm x 52 mm x 74 mm
Package Weight (Imperial)
1.411 lb
Package Weight (Metric)
0.640 kg
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Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

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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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9F61 Size B Clips 1.6in

Frequently Asked Questions

What is the rated voltage for these NH fuse-links?

The rated voltage for these NH fuse-links is 690 VAC according to IEC standards.

What is the ampere range for the NH fuse-links?

The NH fuse-links are available in an ampere range from 2 A to 500 A.

What sizes are available for the NH fuse-links?

The NH fuse-links are available in sizes 000, 00, 0, 1, 2, and 3.

What is the breaking capacity of these fuse-links?

The rated breaking capacity for these NH fuse-links is 80 kA AC.

What are these fuse-links used for?

These 'aM' type NH fuse-links are used for partial-range motor circuit protection.

What standards do these fuse-links comply with?

These fuse-links comply with VDE 0636 Part 201 and IEC 60269-1 and -2 standards.

What materials are the contacts made of?

The contact materials are copper and silver-plated.

What is the body material of the fuse-links?

The body material of these fuse-links is ceramic.

Do these fuse-links contain cadmium?

No, these fuse-links are 0% cadmium.

Are these fuse-links suitable for overload protection?

No, these 'aM' fuse-links are for short-circuit protection only and must be associated with other switchgear for overload protection.

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.