Mersen MEV70A125-4 - EVpack Fuse 700VDC UL 125A Max. Rated Breaking Capacity DC: 20 kA @ 700 V L/R ≤ 1 ms Bolted
Mersen

MEV70A125-4

Alternate Item Number: MEV70A125-4

UPC: 782001482220


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Overview

The Mersen MEV70A125-4 is a critical component within the EVpack-fuse line-up, Mersen's new DC Over-Current Protection (O.C.P.) range. This series is specifically developed to address the unique protection needs of Electric Vehicle (EV), Hybrid Electric Vehicle (HEV), and Battery Electrical Storage Systems (BESS). The MEV70A125-4 provides robust protection for battery packs, ensuring reliable clearing of DC fault currents. Engineered and tested for DC applications, it delivers best-in-class protection performance. Key specifications include an operating voltage of up to 700VDC, a current rating (In) of 125A, and an interrupting rating (IR) of 20 kA at 700V with an L/R ratio of ≤ 1ms. It also features a Minimum Breaking Capacity (MBC) below 3kA, which is ideal for matching with DC contactors. Furthermore, this fuse is designed to withstand high inrush currents in auxiliary applications, such as air conditioning systems, when used with the MEV70V model. Manufactured in the US, this fuse (SKU: MEV70A125-4) offers dependable DC fault current protection for advanced energy systems.
  • 700VDC Maximum Operating Voltage
  • 125A Current Rating (In)
  • 20 kA DC Breaking Capacity @ 700V (L/R ≤ 1 ms)
  • Designed for EV/HEV and Battery Electrical Storage Systems
  • Reliable DC fault current protection

Specifications

Amperage Rating
125 A
Application
Electrical Energy Storage Battery pack protection Battery charger Supercapacitor pack protection Backup protection for DC relay / disconnector / switch Maintenance Safety Disconnect (MSD)
Brand Name
Mersen
Connection
Bolted
Connection Type
Bolted
Current Rating
125 A
DC Voltage Rating
700 V
Mounting
Bolted
Series
EVpack
Size
3.63 x 1.22 in
Size
92.2 x 31 mm
Special Features
Design for DC applications Low watt losses High cycling performance Ultra compact size Current Ratings (In): 35 to 600A Interrupting Rating (IR): 20kA @ 700VDC, L/R =1ms High inrush current capability
Standard
Power Cycling & Vibration JASO D622
Type
Battery Pack Fuses
Voltage Rating
700 V
Voltage Rating
700 VDC
Package Dimensions (L x W x H)
3.63 in x 1.22 in x 1.22 in
Package Dimensions (L x W x H)
92.2 mm x 31 mm x 31 mm
Package Weight (Imperial)
0.364 lb
Package Weight (Metric)
0.165 kg

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.