Mersen MDC08B125B - Fuse MDC08B - DC Distribution 80VAC 80VDC 125A Type Battery Module Bolted
Mersen

MDC08B125B

Alternate Item Number: MDC08B125B

UPC: 782001510572


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Overview

Mersen’s MDC08B125B is a bolted battery module fuse designed for DC distribution applications up to 80VDC and 125A. Engineered for backup protection during shipping, transportation, and handling, this fuse ensures optimal current limitation while maintaining slow melting time for seamless coordination with upstream fast-acting fuses. The MDC08B series incorporates proven fuse technologies to deliver high cycling performance and low watt losses, making it ideal for battery module protection in stationary DC systems, electrical energy storage, EV charging, critical power, and UPS applications. With a minimum breaking capacity (MBC) of 2.0 x In at rated voltage and a maximum interrupting rating of 10kA @ 80VDC, the MDC08B125B provides reliable fault protection. Its ultra-compact design and UL-recognized components (File E60314) ensure compliance with industry standards. Compatible with recommended fuse clips such as C08919P and C08915P, this fuse is a cost-effective solution for protecting battery modules and DC distribution systems.
  • Rated for 80VDC and 125A continuous current
  • Minimum breaking capacity (MBC) of 2.0 x In at rated voltage
  • Maximum interrupting rating of 10kA @ 80VDC
  • Slow melting time for coordination with upstream fuses
  • UL-recognized components (File E60314)

Specifications

AC Voltage Rating
80 V
Amperage Rating
125 A
Application
Battery modules protection Stationary DC systems Battery systems
Body Material
Melamine fiber glass
Connection
Bolted
Connection Material
Tin-Plated Copper
Connection Type
Bolted
Current Rating
125A
DC Voltage Rating
80 V
Mounting
Bolted
Series
MDC08B
Size
3.19 x 0.63 x 0.4 in
Size
81.026 x 16.002 x 10.16 mm
Special Features
Designed for DC applications Low watt losses High cycling performance Low & high current interrupting capability Ultra compact size
Standard
UL Recognized Components (all products) E60314
Type
DC Fuses
Voltage Rating
80VDC Volts
Package Dimensions (L x W x H)
3.19 in x 0.63 in x 0.4 in
Package Dimensions (L x W x H)
81.026 mm x 16.002 mm x 10.16 mm
Package Weight (Imperial)
0.040 lb
Package Weight (Metric)
0.018 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.