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Mersen C209348 - High Voltage DIN Back-up fuse for Transformer Limitor® VDE T4 24kVAC IEC 80A d65mm, L442mm With Striker Standard 80N
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Mersen C209348 High Voltage DIN Back-up fuse for Transformer Limitor® VDE T4 24kVAC IEC 80A d65mm…

Alternate Item Number: 45DB240V80P


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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

The Mersen C209348 is a high-voltage DIN back-up fuse designed for transformer protection in 24kVAC systems. Part of Mersen's Limitor®-P series, this fuse-link meets IEC 60282-1 standards for back-up fuses, providing reliable short-circuit current protection for critical electrical infrastructure. Engineered with a pure silver fuse element and silver-coated copper caps within a durable ceramic body, the C209348 ensures high-quality performance and long service life. Its 80A rated current and 63kA breaking capacity deliver robust protection against damaging fault currents. The fuse features a medium striker mechanism with 80N force and 30mm travel, enabling clear visual or mechanical indication of operation. With dimensions of 65mm diameter and 442mm length, it is optimized for compatibility with standard DIN fuse holders and clips. Key specifications include a clearing I²t of 150 kA²s, minimum breaking current I3 of 360A, and cold resistance R20 of 20 mΩ. At rated current, power dissipation is 233W, and the unit weighs 3.1 kg. The C209348 is suitable for indoor and outdoor applications in high-voltage switchgear, controlgear, and electrical systems where transformer integrity is essential. Coordination with IEC 60787, IEC 62271-105, and IEC/TR 62655 ensures reliable operation within defined protection schemes. The new cap design improves compatibility with various clip types and simplifies installation. For transformer protection in 20kV-rated systems, this fuse provides a dependable solution backed by Mersen's decades of high-voltage fuse expertise.
  • Rated current: 80A for transformer protection in 24kVAC systems
  • Breaking capacity: 63kA for reliable fault current interruption
  • Dimensions: 65mm diameter x 442mm length with 80N striker
  • Silver fuse element and silver-coated copper caps for high conductivity
  • Ceramic body for durability in indoor/outdoor applications
  • Medium striker (80N/30mm) for clear operational indication
  • Clearing I²t: 150 kA²s, minimum breaking current I3: 360A
  • Power dissipation: 233W at rated current, cold resistance R20: 20 mΩ

Specifications

AC Voltage Rating
24 kV
Amperage Rating
80 A
Application
HV Transformer protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Cylindrical
Connection Material
Silver-Plated Copper
Interrupt Rating
63 kA
Mounting
Clip
Size
20 x 2.56 in
Size
508 x 65 mm
Special Features
High breaking capacity High current limitation Low switching voltage Quick breaking Medium striker 80N/30mm Indoor and outdoor applications 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
Standard
IEC 60282-1 VDE 0670 part 4 DIN 43625
Sub Brand
Limitor®
Type
DIN HV Back-up Fuses for Transformers
Type Of Indicators
Striker
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.
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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.