Mersen J1034525 - DIN NH Standard fuse-link gG Size NH4a 500VAC 250VDC 1250A live tags Top indicator Body width 100.10 mm
Mersen

J1034525

Alternate Item Number: NH4AGG50V1250-8


Documents & Media
Specification Sheet

Contact for Pricing

Overview

The Mersen J1034525 is a high-capacity DIN NH Standard fuse-link, specifically a gG type, designed for robust protection in industrial electrical systems. This NH4a size fuse-link operates at a rated voltage of 500VAC and 250VDC, with a substantial current rating of 1250A. It features live tags for safe handling and a top indicator for clear status visualization. The body width measures 100.10 mm, conforming to NH standard dimensions for compatibility with NH fuse bases. As part of the Mersen NH system, this fuse-link is a critical component for safeguarding cables and equipment against overcurrents and short circuits. Type 'gG' fuse-links are recognized for their full range breaking capacity, meaning they can interrupt any current surge from the lowest fusing current up to their rated breaking capacity. This makes them suitable for use as sole protection for circuits and equipment. They are engineered to protect electrical devices and industrial installations from the severe electrodynamic effects of very high short-circuit currents, ensuring operational safety and equipment longevity. The NH system itself is a plug-in fuse system comprising a fuse-base, fuse-link with blade contacts, and a fuse-link replacement device (LV HRC fuse puller). Due to the design's inability to guarantee non-interchangeability of rated current, handling and replacement of NH fuse-links must be performed by qualified professionals. This Mersen J1034525 fuse-link, with its 1250A rating and 500VAC/250VDC capability, is ideal for heavy-duty applications where reliable and comprehensive protection is paramount. Its construction and specifications align with IEC standards, ensuring performance and safety in demanding industrial environments. Originating from France (FR), this product reflects Mersen's commitment to quality and advanced electrical protection solutions.
  • Mersen J1034525 NH4a Fuse-Link
  • Type: gG (Full Range Breaking Capacity)
  • Rated Voltage: 500VAC / 250VDC
  • Rated Current: 1250A
  • Features: Live Tags, Top Indicator, Body Width 100.10 mm

Specifications

AC Voltage Rating
500 V
Amperage Rating
1250 A
Application
gG: General purpose (protection of cables and LV-networks)
Body Material
Ceramic
Brand Name
Mersen
Connection
Plain Blades
Connection Material
Silver-Plated Copper
DC Voltage Rating
250 V
Interrupt Rating
120 kA
Mounting
Clip
Size
7.87 x 3.94 x 48.62 in
Size
200 x 100 x 1235 mm
Special Features
Dimensions in accordance with DIN 43 620 Live tags Top indicator 0 cadmium
Standard
IEC/EN 60269-1 and -2 VDE 0636 Part 201
Type
IEC NH Fuse-Links
Type Of Indicators
Top indicator
Package Dimensions (L x W x H)
7.87 in x 3.94 in x 48.62 in
Package Dimensions (L x W x H)
200 mm x 100 mm x 1235 mm
Package Weight (Imperial)
5.710 lb
Package Weight (Metric)
2.590 kg
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.

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.