Mersen D302706 - Square Body High-Speed Fuse Protistor® Size 71 gR 600VDC IEC 650VDC UL 200A With Striker Open Slot Blades
Mersen

D302706

Alternate Item Number: D71GB60V200EF


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Overview

The Mersen Protistor® Size 71 gR high-speed fuse-link (SKU: D302706) is engineered for precise semiconductor protection in power conversion equipment, including inverters, converters, and rectifiers. Rated for 600VDC (UL) and 650VDC (IEC), this 200A fuse features a square body design with open slot blades for versatile mounting in standard fuse holders or busbar systems. Its construction utilizes pure silver die-cut elements embedded in solidified sand, ensuring superior arc control and low I²t values for fast response to fault conditions. The fuse boasts a high interrupting rating of 126kA, providing robust protection against overcurrents in high-energy circuits. All contact surfaces are silver-plated for optimal conductivity and corrosion resistance, while non-magnetic hardware enhances long-term reliability by preventing magnetic interference in sensitive applications. The power dissipation at rated current is 43W, contributing to efficient thermal management in compact designs. This fuse is ideal for safeguarding diodes, thyristors, GTOs, and IGBTs within industrial power electronics, motor drives, renewable energy systems, and traction applications. Certified to IEC 60269-4 and UL 248 standards, the D302706 meets stringent global safety and performance requirements for both industrial and commercial installations. Optional low-voltage trip indicators are available for remote fault detection, enabling proactive maintenance and system monitoring. The gR speed classification ensures rapid response to short-circuit conditions, minimizing damage to sensitive semiconductor devices. The square body design optimizes space utilization in panel layouts, while the open slot blades facilitate secure and stable electrical connections. The fuse’s high-speed operation is critical in applications where even minor overcurrent events can lead to catastrophic failure, such as in high-power inverters or grid-tied renewable energy systems.
  • Mersen Protistor® Size 71 gR high-speed fuse-link
  • Rated 200A, 600VDC (UL) / 650VDC (IEC)
  • Square body with open slot blades for flexible mounting
  • High interrupting rating of 126kA
  • Silver elements for superior arc control and low I²t
  • Optional low-voltage trip indicator for remote fault signaling
  • Certified to IEC 60269-4 and UL 248 standards

Specifications

Amperage Rating
200 A
Application
Protection of inverters, motor drives, UPS systems and similar 600V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Open Slot Blades
DC Voltage Rating
650 V
Mounting
Bolted
Size
5.25 x 2.01 x 2.22 in
Size
133.4 x 51 x 56.5 mm
Special Features
Multiple body sizes and terminals or blades combination gR Class according to IEC 60269-4 and VDE 636-23 Low I²t for improved semiconductor protection Extremely fast acting Eliminate all overloads Excellent cycling capability
Standard
IEC 60269-4 Compliance UL/CSA Recognized E76491 CCC GB 1359.4
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
650 V
Wattage
42 W
Package Dimensions (L x W x H)
5.25 in x 2.01 in x 2.22 in
Package Dimensions (L x W x H)
133.4 mm x 51 mm x 56.5 mm
Package Weight (Imperial)
1.184 lb
Package Weight (Metric)
0.537 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.