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Mersen GSB1-1/4 - Miniature fuse GSB - Fast-Acting 250VAC 1.25A Size 5x20 Ferrule
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Mersen GSB1-1/4 Miniature fuse GSB - Fast-Acting 250VAC 1.25A Size 5x20 Ferrule

Alternate Item Number: GSB1-1/4

UPC: 782001764845

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Multiplier: 5

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Overview

The Mersen GSB1-1/4 is a fast-acting miniature fuse designed for precise overcurrent protection in low-voltage industrial and electronic applications. This 5x20mm ferrule-type fuse features a glass body and is rated for 250VAC and 1.25A. Its rapid response characteristic ensures swift interruption of fault currents, safeguarding sensitive components like sensors, relays, and control circuits. Key specifications include: Manufacturer: Mersen, SKU: GSB1-1/4, Type: Miniature Fuse, Fast-Acting, Voltage Rating: 250VAC, Current Rating: 1.25A, Size: 5x20mm, Body Material: Glass, Terminal Type: Ferrule. The GSB1-1/4 is ideal for protecting power supply units, control panels, instrumentation, telecommunications equipment, and consumer electronics. Its compact size and reliable performance make it suitable for applications where space is limited but protection is critical. The glass body allows for easy visual inspection of the fuse status. Manufactured by Mersen, this fuse adheres to stringent international standards, ensuring consistent and dependable performance. The 5x20mm ferrule design facilitates easy installation into standard fuse holders. This fuse is recognized by UL and CSA. Additional specifications from Mersen catalog data confirm: UL and CSA Recognized range is 1/16A through 10A at 250VAC.
  • Mersen GSB1-1/4 Miniature Fuse
  • Fast-Acting Performance
  • 250VAC Voltage Rating
  • 1.25A Current Rating
  • 5x20mm Glass Body with Ferrule Terminals

Specifications

AC Voltage Rating
250 V
Amperage Rating
1.25 A
Application
Electronic circuits
Brand Name
Mersen
Case
Glass
Case Material
Glass
Class
Supplemental
Connection
Ferrule
Connection Type
Ferrule
Current Rating
1.25 A
Material
Glass
Mounting
Clip
Series
GSB
Size
0.79 x 0.2 in
Size
20.066 x 5.08 mm
Size
0.79 x 0.2;20.066 x 5.08 in;mm
Size
5x20mm
Size
5x20 mm
Special Features
Glass body Fast-acting 5 mm x 20 mm
Standard
1/2A through 10A, 250VAC, UL and CSA Recognized 1/2A through 6-3/10A, 250VAC, SEMKO Approved 1/2A through 6-3/10A, 250VAC, VDE Approved IEC-127-2 Standard Sheet 2
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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SLO-BLO GLASS AXIAL V-PACK 1A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.

0313001.VXIDP

SLO-BLO GLASS AXIAL V-PACK 1A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.
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GGC-V1/10

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GSC-V1

Miniature fuse GSC-V - Time-Delay 250VAC 1A Size 5x20 Soldered connection
Miniature fuse GSB - Fast-Acting 250VAC 1A Size 5x20 Ferrule

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Frequently Asked Questions

What are the voltage and current ratings for the GSB1-1/4 fuse?

The GSB1-1/4 fuse has a rating of 1-1/4A at 250V.

What is the physical size of the GSB1-1/4 fuse?

The GSB1-1/4 fuse has dimensions of 5 x 20 mm.

Does the GSB1-1/4 fuse have axial leads?

Yes, the GSB1-1/4 fuse is available with axial leads.

What type of body does the GSB1-1/4 fuse have?

The GSB1-1/4 fuse features a glass body.

Is the GSB1-1/4 fuse fast-acting?

Yes, the GSB1-1/4 fuse is designed to be fast-acting.

What standards is the GSB1-1/4 fuse approved under?

The GSB1-1/4 fuse is UL and CSA Recognized, SEMKO Approved, and VDE Approved.

What is the interrupting rating (I.R.) for the GSB1-1/4 fuse?

The interrupting rating for the GSB1-1/4 fuse is 1.

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.