Mersen B090483 - Square Body High-Speed Fuse Protistor® Size 2x123 gR 750VDC IEC 1400A With Striker metric threads
Mersen

B090483

Alternate Item Number: D2123GB75V14CTF


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Overview

The Mersen B090483 Protistor® Size 2x123 gR is a high-speed DC fuse-link engineered for semiconductor and high-power DC protection. Rated at 750VDC and 1400A, this fuse features a square body with metric threads for secure industrial connections. The 'gR' classification confirms its suitability for semiconductor circuits, offering rapid response to overcurrents and short circuits with a pre-arcing I²t of 755 kA²s and clearing I²t of 3700 kA²s at rated voltage. With a rated breaking capacity of 150 kA and power dissipation of 260W at 1400A, it minimizes component damage during faults while ensuring long service life. The integrated striker mechanism provides visual indication of fuse operation, critical for maintenance and safety compliance. Designed for demanding applications like railway power systems and auxiliary circuits, this fuse-link delivers superior protection with lower I²t values compared to conventional fuses. Metric threads (M10/M12) ensure compatibility with standard industrial mounting hardware. Manufactured by Mersen, SKU B090483 meets IEC standards for high-speed DC protection in semiconductor and power electronics environments.
  • 750VDC rated voltage with 1400A current capacity
  • Square body design with metric threads (M10/M12) for secure industrial connections
  • gR classification for semiconductor circuit protection with fast-acting response
  • Pre-arcing I²t: 755 kA²s, Clearing I²t: 3700 kA²s at rated voltage
  • Rated breaking capacity: 150 kA with 260W power dissipation at 1400A

Specifications

Amperage Rating
1400 A
Application
Protection of inverters Protection of motor drives Protection of UPS systems Railway power and auxiliary circuits Similar 750VDC or less equipments
Brand Name
Mersen
Case
Ceramic
Current Rating
1400 A
DC Voltage Rating
750 V
Mounting
Bolted
Mounting Type
metric threads
Series
Protistor®
Size
5.83 x 6.26 x 2.87 in
Size
148 x 159 x 73 mm
Size
Size 2x123
Special Features
Multiple body sizes and terminals or blades combination Very low I²t Extremely fast acting Eliminate all overloads Excellent cycling capability
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
750 V
Voltage Rating
750 VDC
Package Dimensions (L x W x H)
5.83 in x 6.26 in x 2.87 in
Package Dimensions (L x W x H)
148 mm x 159 mm x 73 mm
Package Weight (Imperial)
9.381 lb
Package Weight (Metric)
4.255 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.