Mersen GSD4/10 - Miniature fuse GSD - Fast-Acting 250VAC 0.4A Size 5x20 Ferrule
Mersen

GSD4/10

Alternate Item Number: GSD4/10

UPC: 782001244569


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Overview

The Mersen GSD4/10 miniature fuse is a fast-acting, 250VAC-rated fuse designed for precision protection in low-power electronic circuits. This 5x20mm ceramic fuse with ferrule terminals offers reliable overcurrent protection at 0.4A, ideal for applications requiring fast response to fault conditions. The ceramic body ensures high breaking capacity and thermal stability, meeting IEC 127-2 standards for 5x20mm fuses. Approved by UL, CSA, SEMKO, and VDE, the GSD4/10 is certified for use in industrial control panels, power supplies, and telecom equipment where compact fuse protection is critical. Its ferrule design allows for secure mounting in fuse holders and panels, while the fast-acting characteristic provides immediate response to short circuits or overloads. The 0.4A rating makes it suitable for sensitive electronics where precise current protection is required. Compatible with standard 5x20mm fuse holders, this fuse integrates seamlessly into existing designs without modification.
  • Fast-acting fuse for immediate overcurrent protection
  • 250VAC voltage rating with 0.4A current rating
  • 5x20mm ceramic body with ferrule terminals
  • UL, CSA, SEMKO, and VDE certified
  • IEC 127-2 compliant for 5x20mm fuses

Specifications

AC Voltage Rating
250 V
Amperage Rating
0.4 A
Application
Electronic circuits
Brand Name
Mersen
Case
Ceramic
Class
Supplemental
Connection
Ferrule
Mounting
Clip
Size
0.79 x 0.2 in
Size
20.066 x 5.08 mm
Special Features
Ceramic body Fast-acting 5 mm x 20 mm
Standard
4/10A through 10A, 250VAC, UL & CSA Recognized 1A through 6-3/10A, 250 VAC, SEMKO Approved 1A through 6-3/10A, 250 VAC, VDE Approved IEC 127-2 Standard Sheet 1
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
Miniature fuse GSF - Time-Delay 250VAC 0.4A Size 5x20 Ferrule

GSF4/10

Miniature fuse GSF - Time-Delay 250VAC 0.4A Size 5x20 Ferrule
VERY FAST-ACTING PICO II M-PACK .630A. The PICO® II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating.

0251.630MXL

VERY FAST-ACTING PICO II M-PACK .630A. The PICO® II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating.

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.