Mersen A079465 Square Body High-Speed Fuse Protistor® Size 122 aR 2000VDC IEC 400A With Striker L…
Alternate Item Number: D122SD20C400QF
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Mersen Protistor® Size 122 aR High-Speed Fuse
- Rated for 2000VDC and 400A
- 126 kA Breaking Capacity
- Low I²t values (32.8 kA²s pre-arcing, 270 kA²s clearing)
- Includes striker for remote fault indication
Specifications
Amperage Rating | 400 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 |
Connection Type | L Brackets |
Current Rating | 400 A |
DC Voltage Rating | 2000 V |
Mounting | Bolted |
Series | Protistor® |
Size | 8.54 x 2.56 x 3.01 in |
Size | 217 x 65 x 76.5 mm |
Size | Size 122 |
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 | 175 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
What is the maximum DC voltage rating for this fuse?
The maximum DC voltage rating for this fuse is 2000 VDC.
What is the ampere range for the Protistor size 122 aR fuse?
The ampere range for this fuse is from 160 A to 400 A.
What is the weight of a single Protistor size 122 aR fuse?
The weight of a single Protistor size 122 aR fuse is 1.81 kg.
What standards does this fuse comply with?
This fuse complies with IEC 60269-4 standards.
What are the typical applications for this fuse?
Typical applications include protection of inverters, motor drives, UPS systems, and railway power circuits.
What is the pre-arcing I²t for the 400A version of this fuse?
The pre-arcing I²t for the 400A version (catalog number A079465) is 39649 A²s.
What is the rated breaking capacity for this fuse?
The rated breaking capacity for this fuse is 100 kA.
What is the power dissipation at rated current for the 400A fuse?
The power dissipation at rated current (400A) for this fuse is 175 W.
What is the L/R time constant for this fuse at 1600V?
The L/R time constant at 1600V for this fuse is 15 ms.
What is the maximum total I²t at 1600V for L/R=15ms for the 400A fuse?
The maximum total I²t at 1600V for L/R=15ms for the 400A fuse is 219000 A²s.
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.