Mersen FESC100 - Fuse FES – HRC-II 600VAC 350VDC 100A Blade FESC
Mersen

FESC100

Alternate Item Number: FESC100

UPC: 068938904142


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Overview

The Mersen FESC100 is a Class C fuse designed for short-circuit protection in industrial applications. Manufactured by Mersen, this fuse (SKU: FESC100) features British standard (BS88) dimensions, making it an exact replacement for older HRCII-C fuses and British fuses. It is crucial to note that Class C fuses are not dimensionally or electrically interchangeable with other North American fuse types. The FESC100 boasts a robust ceramic body and a reliable bolt-in mounting design for secure installation. Its specifications include a voltage rating of 600VAC and 350VDC, with a current rating of 100A. This fuse is intended for applications where overload protection is handled by a separate overload relay, such as in motor controllers. The FES Series, including the FESC sub-series, offers protection for DC applications up to 350VDC for 80-100A ratings. Its primary function is to safeguard equipment against damaging short circuits, ensuring operational integrity and preventing costly downtime. The blade connection type and bolt-in mounting ensure a secure and stable electrical connection within the system. Mersen's commitment to quality is evident in the durable ceramic construction, designed for longevity and consistent performance under demanding conditions. This fuse is CSA Certified HRCII-MISC IEC 269-2-1, with a 200kA I.R. AC and 40kA I.R. DC rating.
  • Mersen FESC100 Class C Fuse
  • 100A Current Rating
  • 600VAC / 350VDC Voltage Rating
  • Ceramic Body Construction
  • Blade Connection, Bolt-In Mounting

Specifications

AC Voltage Rating
600 V
Amperage Rating
100 A
Application
Short circuit and back-up protection of motor controllers and components
Body Material
PolyTube
Brand Name
Mersen
Class
Class C
Connection
Blade
Connection Material
Tin-Plated Copper
DC Voltage Rating
350 V
Family Code
119
Family Description
HRC Class C Form II
Fuse Class
Class C
Interrupt Rating
200 kA
Mounting
Bolted
Size
5.31 x 1.34 in
Size
134.874 x 34.036 mm
Special Features
BS88 dimensions Fast-acting
Standard
CSA Certified HRCII-MISC IEC 269-2-1
Type
HRC Fuses
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
5.31 in x 1.34 in x 1.34 in
Package Dimensions (L x W x H)
134.874 mm x 34.036 mm x 34.036 mm
Package Weight (Imperial)
0.900 lb
Package Weight (Metric)
0.408 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.

LCC5

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.