Mersen X079462 - Square Body High-Speed Fuse Protistor® Size 122 aR 2000VDC IEC 200A With Striker L Brackets
Mersen

X079462

Alternate Item Number: D122SD20C200QF


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Specification Sheet

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Overview

The Mersen Protistor® X079462 is a high-speed fuse designed for robust semiconductor protection. This Size 122 fuse operates at 2000VDC and has a rated current of 200A. It features L-brackets for secure mounting and a striker for signaling. Developed to meet the demanding requirements of modern DC equipment, Mersen DC semiconductor fuse-links offer superior performance. They are engineered for extreme environments, providing lower I²t values to minimize damage to protected components during short circuits. This results in reduced power loss and extended operational lifespan. The Protistor® series is crucial for safeguarding sensitive power electronics in applications such as railway power circuits, where reliability and rapid fault interruption are paramount. Its design prioritizes efficient protection and durability, ensuring the integrity of critical systems. The catalog data indicates this fuse is part of the Protistor® size 33 series, with a specific catalog number A060UD33LI2000, rated at 550V/600V, 2000A, with a pre-arcing I²t of 950 kA²s and clearing I²t of 4500 kA²s. It has a rated breaking capacity of 200 kA and power dissipation of 290W.
  • Mersen Protistor® Size 122 aR High-Speed Fuse
  • Rated for 2000VDC and 200A
  • Features L-brackets for secure mounting
  • Includes a striker for fault signaling
  • Designed for critical DC semiconductor protection

Specifications

Amperage Rating
200 A
Application
Protection of inverters Protection of motor drives Protection of UPS systems Protection of similar 2000V or less equipments Railway power and auxiliary circuits
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
DC Voltage Rating
2000 V
Mounting
Bolted
Size
8.54 x 2.56 x 3.01 in
Size
217 x 65 x 76.5 mm
Special Features
Extremely fast acting Extremely current limiting Very low I²t Worldwide acceptability Superior cycling ability
Standard
IEC 60269-4 compliance
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
2000 V
Wattage
118 W
Package Dimensions (L x W x H)
8.54 in x 2.56 in x 3.01 in
Package Dimensions (L x W x H)
217 mm x 65 mm x 76.5 mm
Package Weight (Imperial)
3.990 lb
Package Weight (Metric)
1.810 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.