Mersen V089488 - High-Speed Cylindrical Fuse Protistor® Size 20x127 gR (gRB) 1000VDC IEC 25A
Mersen

V089488

Alternate Item Number: FD20GB100V25


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Overview

The Mersen V089488 Protistor® fuse (SKU: V089488) provides high-speed, full-range protection for DC circuits. This 20x127mm fuse is rated for 1000VDC and 25A, offering fast-acting interruption of fault currents. Its gR classification ensures suitability for protecting semiconductor devices and general DC circuit protection where rapid response is critical. The Protistor® series is engineered for reliability in demanding DC applications, safeguarding auxiliaries, control circuits, and monitoring devices. Key specifications include a rated breaking capacity of 50 kA (as per AC protection data, DC capability is implied for its application). The power dissipation at rated current is 4.25 W. Manufactured in the USA, this fuse adheres to stringent quality standards. Its 20x127mm form factor is a standard industrial size for DC power systems. The Mersen V089488 is essential for maintaining the operational integrity of DC power systems by minimizing damage to sensitive equipment during overcurrent events.
  • Mersen Protistor® series for reliable DC circuit protection
  • 20x127mm cylindrical fuse, gR (gRB) classification
  • Rated for 1000VDC and 25A
  • Fast-acting for rapid fault current interruption
  • Manufactured in the USA

Specifications

Amperage Rating
25 A
Application
DC control circuit, measuring & monitoring auxiliaries circuit
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
Current Rating
25A
DC Voltage Rating
1000 V
Mounting
Clip
Series
Protistor®
Size
20x127
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
1000 V
Wattage
9 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)
0.220 lb
Package Weight (Metric)
0.100 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.
9F61 Size B Clips 1.6in

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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.