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Mersen MEV55C20-S - EVpack Fuse 550VDC UL 20A Max. Rated Breaking Capacity DC: 20 kA @ 550 V L/R ≤ 1 ms Surface Screw Mount
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Mersen MEV55C20-S EVpack Fuse 550VDC UL 20A Max. Rated Breaking Capacity DC: 20 kA @ 550 V L/R ≤ 1 ms…

Alternate Item Number: MEV55C20-S

UPC: 782001482619


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Specification Sheet

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Minimum Qty: 100

Multiplier: 100

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Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen MEV55C20-S EVpack Fuse is a high-performance DC over-current protection device engineered for electric and hybrid vehicle applications. Designed specifically for auxiliary circuit protection in EV/HEV systems, this fuse delivers reliable fault current interruption in demanding automotive environments where space and performance are critical. Rated for 550VDC operation with a maximum current rating of 20A, the MEV55C20-S offers an interrupting rating of 20kA at an L/R ratio of ≤ 1ms, ensuring rapid response to DC faults even under high fault current conditions. Its ultra-compact design minimizes space requirements while maintaining full coverage of battery module voltage and current ranges, making it ideal for integration into tight packaging constraints common in electric vehicle architectures. The surface screw mount configuration simplifies installation in battery junction boxes, battery disconnect units (BDU), and battery management systems (BMS), providing a secure and stable connection for high-current applications. With low watt losses and high cycling performance, the MEV55C20-S is optimized for on-board charging systems and auxiliary circuits in EV/HEV platforms, where efficiency and reliability are essential. The fuse's minimum breaking capacity (MBC) as low as 2xIn ensures precise matching with cable protection, enhancing system safety and reliability by preventing nuisance tripping while still providing robust fault interruption. The fuse is designed to operate effectively in high-temperature environments typical of EV systems, ensuring consistent performance under real-world conditions. Its construction includes materials selected for high dielectric strength and thermal stability, contributing to long service life and reduced maintenance requirements in automotive applications.
  • Voltage rating: 550VDC
  • Current rating: 20A
  • Interrupting rating: 20kA @ 550VDC, L/R ≤ 1ms
  • Surface screw mount for easy installation
  • Ultra-compact design for space-constrained applications

Specifications

Amperage Rating
20 A
Application
EV/HEV Battery pack protection Battery Disconnect Unit (BDU) Battery Management Systm (BMS) Battery Junction Box for auxiliaries On-Board Charging
Brand Name
Mersen
Connection
Surface Screw Mount
Connection Material
Tin-Plated Copper
DC Voltage Rating
550 V
Mounting
PC Mount
Size
2.52 x 0.41 in
Size
64 x 10.3 mm
Special Features
Design for DC applications Low watt losses High cycling performance Full coverage of battery module voltage and current Ultra compact size Current Ratings (In): 5 to 800A Interrupting Rating (IR) for MEV55C: 20kA @550VDC, L/R = 1ms Interrupting Rating (IR) for MEV50A: 30kA @500VDC, L/R = 2.5ms
Standard
Complies to Automotive IATF 16949:2016 Quality System IEC 60 269-4 ISO 8820-8 JAS0 D622
Type
Battery Pack Fuses
Package Dimensions (L x W x H)
2.52 in x 0.41 in x 0.56 in
Package Dimensions (L x W x H)
64 mm x 10.3 mm x 14.1 mm
Package Weight (Imperial)
0.022 lb
Package Weight (Metric)
0.010 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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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.

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.