Mersen V075757 - Square Body High-Speed Fuse Protistor® Size 302 gR (gRE) 2000VDC IEC 250A With Striker L Brackets
Mersen

V075757

Alternate Item Number: D302GE20C250QF

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Specification Sheet

Contact for Pricing

Overview

The Mersen V075757 Protistor® is a high-speed fuse-link designed for semiconductor protection in DC power systems. Rated for 2000VDC and 250A nominal current, this Size 302 gR (gRE) fuse-link provides precise fault interruption for sensitive semiconductor devices. Its square body design with L bracket mounting ensures secure installation in industrial environments. The integrated striker mechanism triggers external signaling devices upon fuse operation, enabling rapid fault detection and system response. With a gR (gRE) classification, it meets IEC standards for general-purpose semiconductor protection. Engineered for low I²t values, the V075757 minimizes thermal stress on protected components during short circuits, reducing downtime and maintenance costs. Its low power dissipation (watts loss) improves system efficiency and extends operational life in demanding applications like railway power systems and DC auxiliary circuits. Built for reliability, this fuse-link delivers superior protection compared to conventional fuse types while maintaining compliance with modern DC equipment requirements.
  • 2000VDC voltage rating for high-power DC systems
  • 250A nominal current with gR (gRE) semiconductor protection classification
  • Square body design with L bracket mounting for secure installation
  • Integrated striker mechanism for external fault signaling
  • Low I²t and power dissipation for minimized thermal stress and improved efficiency

Specifications

Amperage Rating
250 A
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
Current Rating
250A
DC Voltage Rating
2000 V
Mounting
Bolted
Series
Protistor®
Size
Size 302
Size
10.55 x 3.03 x 6.81 in
Size
268 x 77 x 173 mm
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
2000 V
Voltage Rating
2000VDC
Wattage
95 W
Package Dimensions (L x W x H)
12.36 in x 5.04 in x 3.35 in
Package Dimensions (L x W x H)
314 mm x 128 mm x 85 mm
Package Weight (Imperial)
4.424 lb
Package Weight (Metric)
2.006 kg

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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.