Mersen T079482 - Square Body High-Speed Fuse Protistor® Size 302 aR 2400VDC IEC 315A With Striker L Brackets
Mersen

T079482

Alternate Item Number: D302SD24C315QF


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Specification Sheet

Contact for Pricing

Overview

The Mersen T079482 is a Size 302 Protistor® aR high-speed fuse-link specifically engineered for DC semiconductor protection in demanding railway applications. Rated for 2400 VDC and 315 A, this fuse-link offers robust protection for traction power and auxiliary circuits. Its semiconductor fuse-link material is designed to minimize damage to protected components during short circuits, evidenced by its lower I²t values. This reduction in damage translates directly to decreased downtime and lower maintenance costs for critical railway infrastructure. The inclusion of striker L brackets ensures reliable operation and facilitates straightforward integration into existing systems. Optimized for applications such as traction power systems, auxiliary converters, and DC distribution networks, the T079482 provides precise fault protection. Furthermore, its lower watts loss contributes to improved energy efficiency within the system, and its extended operational life ensures long-term reliability in harsh operational environments. Manufactured by Mersen in Mexico, SKU T079482.
  • 2400 VDC voltage rating for high-power DC systems
  • 315 A current rating for substantial circuit protection
  • Size 302 Protistor® aR series for semiconductor protection
  • Striker L brackets for secure mounting and reliable integration
  • Designed for railway power and auxiliary circuits with low I²t

Specifications

Amperage Rating
315 A
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
Connection Type
Striker L Brackets
Current Rating
315 A
DC Voltage Rating
2400 V
Material
Semiconductor fuse-link material (not explicitly stated)
Material
Protistor
Material
Silver-plated contact surfaces, non-magnetic hardware
Mounting
Bolted
Mounting Type
L Brackets
Mounting Type
Striker L Brackets
Series
Protistor®
Series
Protistor
Size
Size 302
Size
10.55 x 3.03 x 3.41 in
Size
268 x 77 x 86.5 mm
Size
Size 302 aR
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
2400 V
Wattage
186 W
Package Dimensions (L x W x H)
10.55 in x 3.03 in x 3.41 in
Package Dimensions (L x W x H)
268 mm x 77 mm x 86.5 mm
Package Weight (Imperial)
4.034 lb
Package Weight (Metric)
1.830 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.

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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.