Mersen D082803 - High-Speed Cylindrical Fuse Protistor® Size 20x127 gR (gRD) 1500VDC IEC 20A
Mersen

D082803

Alternate Item Number: FD20GD150V20


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Overview

The Mersen D082803 is a high-speed cylindrical fuse, part of the Protistor® series, designed for robust DC applications. This fuse features a 20x127mm size and a gR (gRD) classification, providing full-range protection. It is rated for 1500VDC and 20A, making it suitable for safeguarding auxiliaries, control circuits, and other measuring and monitoring devices within DC power systems. The fast-acting nature of this fuse is critical for preventing damage to sensitive electronic components. Its construction ensures reliable performance in industrial settings. Key specifications include a rated voltage of 1500VDC and a rated current of 20A. The gR designation signifies its suitability for general-purpose protection, balancing speed with current-carrying capacity. Manufactured in France, the D082803 adheres to stringent production standards. Its cylindrical form factor facilitates easy integration into electrical panels and equipment, ensuring the operational integrity and longevity of DC power systems.
  • Mersen Protistor® high-speed cylindrical fuse
  • Rated 1500VDC and 20A
  • Size 20x127mm
  • gR (gRD) classification for full-range protection
  • Designed for DC power system auxiliaries and control circuits

Specifications

Amperage Rating
20 A
Application
DC control circuit, measuring & monitoring auxiliaries circuit
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
DC Voltage Rating
1500 V
Mounting
Clip
Size
5 x 0.81 in
Size
127 x 20.6 mm
Special Features
International 20x127mm (13/16" x 5") for worldwide acceptance gR Class according to VDE 636-23 and IEC 60269-4 Low I²t for improved semiconductor protection Eliminate all overloads Extremely fast acting Current limiting Excellent cycling capability
Standard
UL Recognized for some ratings UL file No. E76491 IEC 60269-4 Compliance
Sub Brand
Protistor®
Type
IEC High-Speed Cylindrical Fuse-Links DC Protection
Voltage Rating
1500 V
Wattage
9.6 W
Package Dimensions (L x W x H)
5 in x 0.81 in x 0.81 in
Package Dimensions (L x W x H)
127 mm x 20.6 mm x 20.6 mm
Package Weight (Imperial)
0.214 lb
Package Weight (Metric)
0.097 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.
9F61 Size B Clips 1.6in

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9F61 Size B Clips 1.6in

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.