Mersen W087373 - High-Speed Cylindrical Fuse Protistor® Size 36x250 gR (gRB) 2000VDC IEC 40A With Striker
Mersen

W087373

Alternate Item Number: FD36GB200V40K


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Overview

The Mersen W087373 is a high-speed cylindrical fuse-link from the Protistor® series, designed for robust protection in demanding DC applications. Rated for 2000VDC and 40A, this fuse is engineered to provide superior protection for railway power and auxiliary circuits, as well as other new DC equipment. Its gR (gRB) classification ensures fast-acting response to overcurrents, minimizing damage to sensitive components. Developed to meet the performance requirements of modern DC systems, these fuse-links offer improved characteristics over traditional fuse types. Key benefits include lower I²t values, which significantly reduce the energy let-through during short circuits, thereby safeguarding protected equipment. Furthermore, the W087373 features lower power dissipation (watts loss), contributing to system efficiency and longevity. The inclusion of a striker mechanism provides a clear visual indication of fuse operation. Manufactured by Mersen, a leader in electrical protection, this fuse is built to the highest standards, ensuring reliability and safety. Its size is 36x250mm, and it is manufactured in the USA. This fuse is ideal for applications requiring fast, reliable overcurrent protection in high-voltage DC environments.
  • High-speed cylindrical fuse-link for DC applications
  • Rated 2000VDC and 40A for robust protection
  • gR (gRB) classification for fast-acting overcurrent response
  • Features a striker for visual indication of operation
  • Lower I²t values and power dissipation for system efficiency

Specifications

Amperage Rating
40 A
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
Current Rating
40A
DC Voltage Rating
2000 V
Mounting
Clip
Series
Protistor®
Size
11.73 x 1.42 in
Size
298 x 36 mm
Size
36x250
Sub Brand
Protistor®
Type
IEC High-Speed Cylindrical Fuse-Links DC Protection
Voltage Rating
2000 V
Wattage
33.6 W
Package Dimensions (L x W x H)
11.73 in x 1.42 in x 1.42 in
Package Dimensions (L x W x H)
298 mm x 36 mm x 36 mm
Package Weight (Imperial)
1.470 lb
Package Weight (Metric)
0.667 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.

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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.

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.