Mersen GSD1/4-B - 250V Fast Acting Glass 5mm x 20mm 250 Volts 0.25 Amps GSD (bulk packaging) series.
Mersen

GSD1/4-B

Alternate Item Number: 782001387662

UPC: 782001387662

Contact for Pricing

Overview

The Mersen GSD1/4-B is a critical component for reliable circuit protection, engineered to safeguard sensitive electronic and industrial equipment from overcurrent events. As a fast-acting glass fuse from the reputable GSD series, this particular model boasts a precise 0.25 Amp rating and a 250 Volt capacity, making it ideal for a wide array of applications where rapid interruption of fault currents is paramount. Its compact 5mm x 20mm form factor ensures compatibility with numerous standard fuse holders and compact electronic assemblies, while the bulk packaging option is specifically designed to meet the demands of high-volume manufacturing and maintenance operations, offering both cost-efficiency and convenience. Mersen is a globally recognized leader in electrical protection and power management solutions, and the GSD series exemplifies their commitment to quality and performance. This fast-acting fuse is constructed with high-quality materials to ensure consistent and dependable operation, minimizing downtime and preventing costly damage to downstream components. The "fast-acting" characteristic means the fuse will blow very quickly when an overcurrent condition occurs, significantly reducing the duration and severity of the fault. This is crucial for protecting delicate semiconductor devices, microprocessors, and other sensitive circuitry that cannot tolerate prolonged exposure to excessive current. Key specifications and benefits of the Mersen GSD1/4-B include: * **Fast-Acting Performance:** Designed for rapid interruption of overcurrents, protecting sensitive equipment. * **Precise Ratings:** 250V voltage rating and 0.25A current rating ensure accurate circuit protection. * **Standard Size:** 5mm x 20mm dimensions for broad compatibility with existing fuse holders and equipment. * **Durable Construction:** High-quality glass body and internal elements for reliable, long-term performance. * **Bulk Packaging:** Economical and convenient for large-scale industrial use, ensuring consistent supply. Typical applications for the Mersen GSD1/4-B fuse span across various industries. It is commonly found in power supplies for consumer electronics, industrial control panels, telecommunications equipment, medical devices, and laboratory instrumentation. Its role is to act as a sacrificial device, absorbing the energy of an overcurrent event to protect more expensive and vital components. When selecting a fuse, professionals consider the operating voltage, the maximum expected current, the required interruption capacity, and the speed of response. The GSD1/4-B is an excellent choice for applications requiring a low current rating with fast-acting protection. By choosing Mersen fuses, engineers and technicians are investing in a legacy of reliability and innovation. The GSD1/4-B is not just a fuse; it's a vital safeguard that contributes to the overall safety, efficiency, and longevity of complex electrical systems. Its availability in bulk packaging further underscores its suitability for OEM manufacturers and large-scale maintenance projects where consistent quality and supply chain efficiency are critical. Ensure your critical circuits are protected with the trusted performance of Mersen.
  • Mersen GSD1/4-B Fast Acting Glass Fuse
  • 250 Volts, 0.25 Amps
  • 5mm x 20mm Standard Size
  • Ideal for sensitive electronic and industrial circuits
  • Bulk packaging for high-volume applications

Specifications

Amperage Rating
0.25 A
Application
Electronic circuits
Brand Name
Ferraz Shawmut
Connection
Ferrule
Current Rating
0.25 A
Interrupt Rating
1.5 kA
Material
Glass
Mounting
Clip
Series
GSD
Size
5mm x 20mm
Special Features
Ceramic BodyFast-Acting5mm x 20mmGSD-V fuses have 1-1/2" wire lead each end.
Standard
UL/CSA Recognized 1/16A - 10A, 250VAC, SEMKO Approved 1A - 6-3/10A, 250VAC VDE Approved 1A - 6-3/10A, 250VAC, !EC 127-2 Sheet 1
Type
5 X 20 mm miniature fuses
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
0.787 IN x 0.2 IN x 0.2 IN
Package Dimensions (L x W x H)
19.9898 mm x 5.08 mm x 5.08 mm
Package Weight (Imperial)
0.500 L
Package Weight (Metric)
0.227 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.