Mersen Q079479 - Square Body High-Speed Fuse Protistor® Size 300 aR 2400VDC IEC 180A With Striker L Brackets
Mersen

Q079479

Alternate Item Number: D300SE24C180QF


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Specification Sheet

Contact for Pricing

Overview

The Mersen Q079479 is a Size 300 aR Protistor® high-speed fuse-link engineered for robust DC protection in demanding railway power and auxiliary circuits. Operating at 2400VDC, this fuse-link is specifically designed to minimize I²t values, thereby reducing stress on protected components during short-circuit events. This reduction in stress directly contributes to a lower risk of damage and an extended service life for critical equipment. With a precise current rating of 180A, the Q079479 meets stringent IEC standards for DC semiconductor applications, ensuring reliable performance. The integrated striker L brackets provide a clear visual or remote indication of fuse operation, enhancing system monitoring and reliability. This fuse-link is an ideal choice for modern DC equipment that requires accurate thermal and electrical performance characteristics. Compared to conventional fuses, the Q079479 offers lower watts loss, leading to improved energy efficiency and reduced heat generation within the system. As part of Mersen’s comprehensive DC semiconductor fuse portfolio, it guarantees consistent and dependable protection in high-demand traction power systems. SKU: Q079479. Country of Origin: Mexico.
  • High-speed DC protection for railway applications
  • 2400VDC voltage rating
  • 180A current rating
  • Size 300 aR designation
  • Striker L brackets for fuse operation indication

Specifications

Amperage Rating
180 A
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
Current Rating
180 A
DC Voltage Rating
2400 V
Mounting
Bolted
Mounting Type
Square Body with Striker L Brackets
Mounting Type
L Brackets
Series
Protistor
Series
Protistor®
Size
10.55 x 2.28 x 2.48 in
Size
268 x 58 x 63 mm
Size
Size 300
Size
Size 300 aR
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
2400 V
Wattage
98 W
Package Dimensions (L x W x H)
10.55 in x 2.28 in x 2.48 in
Package Dimensions (L x W x H)
268 mm x 58 mm x 63 mm
Package Weight (Imperial)
2.535 lb
Package Weight (Metric)
1.150 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.