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Mersen N1000259 - High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 24kVAC IEC 50A d65mm, L442mm With Striker 80N
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Mersen N1000259 High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 24kVAC IEC 50A d65mm…

Alternate Item Number: 45DB240V50PD


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Specification Sheet

Contact for Pricing

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

Overview

Rated at 24kV AC with a current rating of 50A, this fuse features a 65mm diameter and 442mm length, including a striker pin rated at 80N. The fuse-link utilizes pure silver fuse elements, copper caps with silver plating, and a ceramic body to ensure long-term reliability and high breaking capacity. The striker mechanism provides a visual and mechanical indication of fuse operation, enhancing safety in high-voltage applications. The 50A rating makes it suitable for medium-voltage transformer installations where precise fault interruption is required. Mersen’s Limitor®-PD series is trusted globally in high-voltage switchgear and controlgear applications, offering consistent performance in critical protection scenarios. The ceramic body ensures high dielectric strength and thermal stability, while the silver-plated copper caps enhance conductivity and corrosion resistance. For applications outside the 6.3A–160A range, Mersen offers the Limitor®-P HV fuse series as an alternative. Its compact design and robust construction make it ideal for use in confined spaces within switchgear assemblies. The fuse’s high breaking capacity ensures reliable operation even under extreme fault conditions, providing dependable protection for transformers and associated equipment.
  • Rated for 24kV AC with 50A current capacity
  • 65mm diameter and 442mm length with 80N striker
  • Pure silver fuse elements and silver-plated copper caps for reliability
  • Ceramic body for high breaking capacity and energy efficiency
  • Ceramic body for high durability and breaking capacity

Specifications

AC Voltage Rating
24 kV
Amperage Rating
50 A
Application
HV Transformer protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Cylindrical
Connection Material
Silver-Plated Copper
Current Rating
50 A
Current Rating
50A
Interrupt Rating
65 kA
Material
Ceramic body with pure silver fuse elements and silver-coated copper end caps
Material
Pure silver, copper (silver-coated), ceramic
Mounting
Clip
Series
Limitor®-PD
Size
20 x 2.56 in
Size
508 x 65 mm
Size
d65mm, L442mm
Special Features
High breaking capacity High current limitation Low switching voltage Quick breaking medium striker 80N/30mm Energy efficency New cap design for a better compatibility with all types of clips and easier assembly Coordination with IEC 60787, IEC 62271-105, IEC/TR 62655 Indoor and outdoor applications
Standard
IEC 60282-1 VDE 0670 part 4 VDE 0670 part 402 DIN 43625
Sub Brand
Limitor®
Type
DIN HV Back-up Fuses for Transformers
Type Of Indicators
Striker
Voltage Rating
24kVAC
Voltage Rating
24 kVAC
Package Dimensions (L x W x H)
20 in x 2.56 in x 2.56 in
Package Dimensions (L x W x H)
508 mm x 65 mm x 65 mm
Package Weight (Imperial)
6.834 lb
Package Weight (Metric)
3.100 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.

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

What standards does the N1000259 comply with?

The N1000259 complies with IEC 60282-1 and VDE 0670 T402 standards for high-voltage back-up fuses.

What is the striker pin force rating?

The striker pin is rated at 80N, ensuring reliable activation during fault conditions.

What materials are used in the fuse construction?

The fuse elements are made of pure silver, caps are copper with silver plating, and the body is ceramic.

What is the fuse diameter and length?

The fuse has a diameter of 65mm and a length of 442mm.

What is the current rating of the N1000259?

The N1000259 has a current rating of 50A.

Is the N1000259 suitable for outdoor use?

Yes, the N1000259 is designed for both indoor and outdoor applications.

What is the breaking capacity of the N1000259?

The N1000259 offers high breaking capacity, ensuring effective interruption of fault currents.

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.