Mersen W079461 - Square Body High-Speed Fuse Protistor® Size 120 aR 2000VDC IEC 215A With Striker L Brackets
Mersen

W079461

Alternate Item Number: D120SC20C215QF


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Overview

Mersen Protistor® Size 120 aR high-speed DC fuse (SKU: W079461) delivers precise protection for railway power and auxiliary circuits operating at 2000VDC. Rated at 215A, this square-body fuse-link features a low I²t value to minimize damage during short circuits, ensuring extended component lifespan. Designed for elevated operating temperatures, it reduces watts loss while maintaining high breaking capacity. The striker mechanism with L brackets enables direct microswitch activation (compatible with Mersen microswitch ref. G310023, MCR3E1-5N) for immediate fault indication. Ideal for modern DC equipment requiring reliable semiconductor protection. Complies with IEC standards for high-speed fuse-links. This aR rated fuse is specifically designed for the protection of DC power converters and DC traction applications. Its square body design facilitates efficient heat dissipation, contributing to its performance in demanding environments. The fuse-link construction ensures fast acting interruption of overcurrents, safeguarding sensitive semiconductor devices. The integrated striker provides a reliable mechanical signal upon fuse operation, crucial for system monitoring and control.
  • 2000VDC voltage rating for high-power DC applications
  • 215A current rating with low I²t for minimal component damage
  • Square body design with striker and L brackets for microswitch activation
  • Operates efficiently at elevated temperatures with reduced watts loss
  • IEC-compliant high-speed fuse-link for semiconductor protection

Specifications

Amperage Rating
215 A
Application
Protection of inverters Protection of motor drives Protection of UPS systems Protection of similar 2000V or less equipments Railway power and auxiliary circuits EES Battery Rack protection
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
DC Voltage Rating
2000 V
Mounting
Bolted
Size
8.54 x 1.73 x 2.47 in
Size
217 x 44 x 62.7 mm
Special Features
Extremely fast acting Extremely current limiting Very low I²t Worldwide acceptability Superior cycling ability
Standard
IEC 60269-4 compliance
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
2000 V
Wattage
106 W
Package Dimensions (L x W x H)
8.54 in x 1.73 in x 2.47 in
Package Dimensions (L x W x H)
217 mm x 44 mm x 62.7 mm
Package Weight (Imperial)
1.984 lb
Package Weight (Metric)
0.900 kg
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9F61 Size B Clips 1.6in

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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 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.