Mersen GGM1-1/4 - Miniature fuse GGM - Fast-Acting 250VAC 1.25A Size 5x20 Ferrule
Mersen

GGM1-1/4

Alternate Item Number: GGM1-1/4

UPC: 782001769024

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Minimum Qty: 5

Multiplier: 5

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Overview

The Mersen GGM1-1/4 miniature fuse is a high-performance, fast-acting protection device engineered for precision circuit safeguarding in compact electronic and electrical systems. Designed with a 5x20mm glass ferrule body, this fuse meets stringent industrial standards for reliability and safety, delivering robust overcurrent protection at up to 250VAC. Manufactured by Mersen, a global leader in electrical protection solutions, the GGM1-1/4 combines fast response characteristics with a 1.25A current rating to ensure rapid interruption of fault currents, minimizing equipment damage and downtime. This miniature fuse is ideal for applications where space is at a premium but protection cannot be compromised. Commonly deployed in power supplies, instrumentation, telecommunications equipment, and control panels, the GGM1-1/4 excels in environments requiring precise current interruption. Its fast-acting nature makes it particularly suitable for protecting sensitive electronics against transient surges and overloads, where even a slight delay in response could result in catastrophic failure. The GGM1-1/4 features a glass body construction, which provides visual confirmation of fuse status and enhances thermal stability during operation. The ferrule terminals ensure secure and stable connections, reducing the risk of poor contact or intermittent failures—critical factors in mission-critical applications. With a compact 5x20mm footprint, this fuse is compatible with standard fuse holders and clips, offering seamless integration into existing designs without requiring additional space or retooling. Mersen’s reputation for engineering excellence is reflected in the GGM1-1/4, a product that adheres to international safety certifications and undergoes rigorous quality control. Professionals in industrial automation, renewable energy systems, and consumer electronics rely on Mersen fuses for consistent performance under demanding conditions. Whether used in a high-volume manufacturing line or a precision laboratory instrument, the GGM1-1/4 delivers dependable protection with minimal maintenance. Installation is straightforward: simply insert the fuse into a compatible holder, ensuring the ferrule terminals are properly seated to maintain electrical continuity. Regular inspection of the fuse—visible through the glass body—allows for quick troubleshooting and replacement when necessary. For engineers and technicians, selecting the right fuse involves balancing current rating, voltage rating, and response time; the GGM1-1/4 is optimized for applications where fast-acting response and compact form factor are both essential. In summary, the Mersen GGM1-1/4 miniature fuse is a trusted solution for protecting low-to-medium power circuits in a wide range of industrial and commercial applications. Its combination of fast-acting performance, compact size, and Mersen’s legacy of quality makes it a preferred choice for professionals who demand both reliability and precision in their protection strategies.
  • Fast-acting response for rapid fault current interruption
  • 250VAC voltage rating with 1.25A current rating
  • 5x20mm glass ferrule construction for durability and visibility
  • Compact design ideal for space-constrained applications
  • Mersen brand reliability with global safety certifications

Specifications

AC Voltage Rating
250 V
Amperage Rating
1.25 A
Application
Electronic circuits
Brand Name
Mersen
Case
Glass
Class
Supplemental
Connection
Ferrule
Connection Type
Ferrule
Current Rating
1.25A
Material
Glass
Mounting
Clip
Series
GGM
Size
0.79 x 0.2 in
Size
20.066 x 5.08 mm
Size
5x20mm
Special Features
Glass body Fast-acting 5 mm x 20 mm
Standard
1/16A through 3A, 250VAC, UL Listed and CSA Certified 4A through 8A, 125VAC, UL Listed and CSA Certified 10A and 15A, 250VAC, UL Recognized
Type
5x20mm
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
0.79 in x 0.2 in x 0.2 in
Package Dimensions (L x W x H)
20.066 mm x 5.08 mm x 5.08 mm
Package Weight (Imperial)
0.010 lb
Package Weight (Metric)
0.005 kg
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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.