Mersen GMS3/4 - Mersen GMS series alarm indicating fuses are used in telecommunications equipment or other applications. A color coded flag indicates a circuit problem which caused the fuse to blow. Nineteen ampere ratings/colors fill every replacement need 125 Volts 0.75 Amps GMS series.
Mersen

GMS3/4

Alternate Item Number: 782001760878

UPC: 782001760878


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Specification Sheet

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Overview

The Mersen GMS3/4 (SKU: GMS3/4) is an alarm-indicating midget fuse designed for reliable overcurrent protection in telecommunications and other sensitive electronic applications. Manufactured by Mersen, a leader in electrical protection, this fuse features a visual blown fuse indicator. When the fuse operates due to an overcurrent or short circuit, a color-coded flag pops out, providing an immediate, unambiguous visual signal of a circuit fault. This feature significantly reduces diagnostic time and minimizes equipment downtime, crucial in environments like central offices and data centers. Key specifications include a voltage rating of 125V AC and a precise current rating of 0.75 Amps. The GMS series offers nineteen different ampere ratings, each with a unique color-coded flag, ensuring compatibility and easy identification for replacement needs. The fuse dimensions are 1-1/2" x 13/32" (10 mm x 38 mm), fitting standard midget fuse holders. While the provided catalog data focuses on GFN and GGU series for similar applications, the GMS series is specifically noted for its alarm indication. The GFN series, for example, is described as a time-delay fuse with a built-in indicator that can also be used to trip a switch for remote annunciation. The GMS3/4 is intended for supplemental protection, not branch circuit protection. Applications for the Mersen GMS3/4 fuse include, but are not limited to: telecommunications equipment, power supplies for electronic devices, control panels, instrumentation, alarm and security systems, and test and measurement equipment. Its design ensures it operates above 0.9 volts and provides a clear visual indication or can be used with optional auxiliary microswitches for remote signaling. The fuse is UL Listed to standard 248-14 (for ratings up to 15A) and CSA Certified to Standard C22.2 No. 248.14, providing assurance of quality and safety.
  • Alarm indicating fuse with color-coded flag for visual fault identification
  • 125V AC voltage rating
  • 0.75 Amp current rating
  • Standard midget fuse dimensions: 1-1/2" x 13/32" (10 mm x 38 mm)
  • Ideal for telecommunications and sensitive electronic equipment

Specifications

Amperage Rating
0.75 A
Brand Name
Ferraz Shawmut
Current Rating
0.75 A
Interrupt Rating
.3 kA
Mounting
Clip
Series
GMS
Special Features
Color coded Body material PPS UL 94V0
Type
Telecommunications Fuses
Type Of Indicators
Colored indicator flag
Voltage Rating
125 VAC
Package Dimensions (L x W x H)
0.722 IN x 0.638 IN x 0.126 IN
Package Dimensions (L x W x H)
18.3388 mm x 16.2052 mm x 3.2004 mm
Package Weight (Imperial)
0.010 L
Package Weight (Metric)
0.005 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.