Mersen F079447 - Square Body High-Speed Fuse Protistor® Size 2x72 aR 1200VDC IEC 630A With Striker
Mersen

F079447

Alternate Item Number: D272SG120V630QF


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Specification Sheet

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Overview

The Mersen F079447 is a Size 2x72 Protistor® high-speed fuse-link engineered for critical DC semiconductor protection. This fuse-link is specifically designed for demanding applications such as railway power and auxiliary circuits, offering robust protection for sensitive components. It features a square body construction and is rated for 1200VDC and 630A, aligning with IEC standards. Key specifications include a breaking capacity of 126 kA and a pre-arcing I²t of 106.3 kA²s. These values ensure rapid and reliable fault interruption, minimizing damage to equipment during short circuits. The F079447 exhibits lower I²t values compared to older technologies, contributing to enhanced protection and reduced system stress. Furthermore, it offers lower watt loss, which improves overall system efficiency and can extend operational life. The 'aR' designation confirms its suitability for semiconductor protection. The fuse-link is equipped with a striker mechanism, facilitating integration with tripping systems for enhanced safety and operational monitoring. Mersen's commitment to advanced fuse technology is evident in the F079447, providing dependable protection for critical DC power systems.
  • Mersen Protistor® High-Speed Fuse-Link
  • Rated 630A, 1200VDC
  • Size 2x72, aR designation for semiconductor protection
  • 126 kA breaking capacity
  • Pre-arcing I²t: 106.3 kA²s
  • Square body construction with striker mechanism

Specifications

Amperage Rating
630 A
Application
Protection of inverters Protection of motor drives Protection of UPS systems Protection of similar 1200V or less equipments Railway power and auxiliary circuits
Brand Name
Mersen
Case
Ceramic
DC Voltage Rating
1200 V
Mounting
Bolted
Size
6.42 x 2.36 x 6.41 in
Size
163 x 60 x 162.7 mm
Special Features
Low I²t for improved semiconductor protection Extremely fast acting Excellent cycling capability
Standard
IEC 60269-4 Compliance GB/T 13539.4-2016
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
1200 V
Wattage
230 W
Package Dimensions (L x W x H)
6.42 in x 2.36 in x 6.41 in
Package Dimensions (L x W x H)
163 mm x 60 mm x 162.7 mm
Package Weight (Imperial)
5.291 lb
Package Weight (Metric)
2.400 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.