Mersen B1028722 DIN NH Standard fuse-link gTr Size NH4a 400VAC 361A 250KVA live tags Center indicator…
Alternate Item Number: NH4AGTR250KVA
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Rated for 400 VAC and 361 A with 250 kVA transformer capacity
- gTr time/current characteristic optimized for transformer thermal properties
- Continuous loading up to 1.3x nominal current for 10 hours; operates within 2 hours at 1.5x nominal current
- Live gripping-lugs for secure contact and center indicator for operational status visibility
- Body width 72.9 mm, blade contact connections for NH system fuse bases
Specifications
AC Voltage Rating | 400 V |
Amperage Rating | 361 A |
Application | Protection of transformers |
Body Material | Ceramic |
Brand Name | Mersen |
Connection | Plain Blades |
Connection Material | Silver-Plated Copper |
Connection Type | Blade contacts |
Connection Type | Blade Contact |
Current Rating | 361 A |
Interrupt Rating | 100 kA |
Mounting | Clip |
Mounting Type | Plug-in (NH System) |
Mounting Type | Plug-in |
Series | gTr |
Size | 7.87 x 2.87 x 4.8 in |
Size | 200 x 73 x 122 mm |
Size | NH4a |
Special Features | Maximum transformer capacity (up to 1,3 x In) Reduction of unnecessary interruption of operation Precise cut off of overload Characteristic adapted to the transformer Resistant to ageing Selectivity to fuse links gG High current limiting High breaking capacity Easy selection between transformer and fuse link |
Standard | VDE 0636 Part 201 IEC 60269-1 and -2 |
Type | IEC NH Fuse-Links |
Type Of Indicators | Center indicator |
Voltage Rating | 400 VAC |
Package Dimensions (L x W x H) | 7.87 in x 2.87 in x 4.8 in |
Package Dimensions (L x W x H) | 200 mm x 73 mm x 122 mm |
Package Weight (Imperial) | 4.850 lb |
Package Weight (Metric) | 2.200 kg |
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Frequently Asked Questions
What is the primary application for NH fuse-links gTr?
NH fuse-links gTr are specifically designed for the protection of transformers.
What is the operating voltage for these NH fuse-links?
These NH fuse-links operate at a voltage of 400 VAC.
What is the rated breaking capacity (I.R. AC) according to IEC standards?
The I.R. AC (IEC) for these fuse-links is 100 kA.
What are the available sizes for the NH fuse-links gTr?
The available sizes are 2, 3, and 4a according to the standard.
What is the body material of the NH fuse-links?
The body material of these fuse-links is ceramic.
What materials are used for the contacts?
The contact materials are copper, silver-plated.
What is the time/current characteristic of these fuses?
The time/current characteristic is gTr, which is adapted to the protected transformer.
How long can these fuses be loaded with 1.3 times their nominal current?
The fuses can be loaded with 1.3 times their nominal current for up to 10 hours.
What is the Ampere Range for these NH fuse-links?
The Ampere Range is from 72 A to 1443 A.
Are these fuses suitable for direct handling by any user?
No, due to the design not guaranteeing non-interchangeability of rated current, it must be handled by a qualified professional.
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.