Mersen GDG1/2 - Miniature fuse GDG - Time-Delay 250VAC 0.5A Size 5x20 Ferrule
Mersen

GDG1/2

Alternate Item Number: GDG1/2

UPC: 782001764371

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Overview

The **Mersen GDG1/2 miniature time-delay fuse** (SKU: GDG1/2) is a high-performance, glass-bodied fuse designed for precision protection in low-voltage electrical circuits. Engineered to meet the demands of modern industrial and commercial applications, this 250VAC-rated fuse operates at 0.5A with a time-delay characteristic, ensuring reliable performance in dynamic load conditions. The 5x20mm ferrule design allows for secure mounting in fuse holders, panels, and distribution boards, making it a versatile choice for engineers and technicians seeking durable, long-lasting protection. Miniature fuses like the GDG1/2 are essential components in electrical systems where space constraints and precise current ratings are critical. Unlike standard fast-acting fuses, time-delay fuses provide a buffer against temporary current surges—such as those caused by motor startups or capacitor charging—without compromising safety or longevity. This makes the GDG1/2 ideal for applications where nuisance tripping must be avoided, including control panels, instrumentation, and sensitive electronic equipment. Mersen, a global leader in electrical protection and thermal management solutions, has designed the GDG1/2 to meet stringent international standards, ensuring compliance with IEC 60127 and UL 248. The glass body not only provides visual confirmation of fuse status but also enhances thermal stability and dielectric strength. The ferrule terminals are corrosion-resistant, ensuring consistent electrical contact and reducing the risk of intermittent failures in harsh industrial environments. Typical applications for the GDG1/2 include: - **Industrial control systems** (PLCs, relays, and motor starters) - **Telecommunications equipment** (power supplies and distribution units) - **Medical devices** (where reliability and precision are paramount) - **Automotive and aerospace electronics** (for compact, high-integrity circuits) - **Renewable energy systems** (solar inverters and battery management) When selecting a miniature fuse, professionals prioritize factors such as voltage rating, current rating, response time, and physical dimensions. The GDG1/2 excels in all these areas, offering a 250VAC rating for compatibility with global power systems, a 0.5A current rating for low-power applications, and a time-delay feature to handle transient loads. Its 5x20mm size is a standard in the industry, ensuring interchangeability with other fuses in the same category. Installation is straightforward: the fuse is inserted into a compatible holder or panel, with the ferrule terminals providing a secure, vibration-resistant connection. Mersen’s reputation for quality and innovation ensures that the GDG1/2 delivers consistent performance, even in high-temperature or high-vibration environments. For engineers and technicians, this means fewer maintenance calls, reduced downtime, and enhanced system reliability. In summary, the **Mersen GDG1/2 miniature time-delay fuse** is a trusted solution for applications requiring precise, reliable overcurrent protection. Its combination of high-quality materials, time-delay functionality, and compact design makes it a go-to choice for industries where electrical safety and performance are non-negotiable. Whether in a factory automation system, a medical device, or a renewable energy installation, the GDG1/2 provides the peace of mind that comes with Mersen’s engineering excellence.
  • 250VAC rated for global compatibility
  • 0.5A current rating with time-delay protection
  • 5x20mm glass ferrule design for secure mounting
  • Compliant with IEC 60127 and UL 248 standards
  • Ideal for industrial, telecom, medical, and renewable energy applications

Specifications

AC Voltage Rating
250 V
Amperage Rating
0.5 A
Application
Electronic circuits
Brand Name
Mersen
Case
Glass
Case Material
Glass
Class
Supplemental
Connection
Ferrule
Connection Type
Ferrule
Current Rating
0.5 A
Material
Glass
Mounting
Clip
Mounting Type
Panel Mount
Series
GDG
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
5x20 mm
Special Features
Glass body Time-delay 5 mm x 20 mm
Standard
1/16A through 10A, 250VAC, UL & CSA Recognized 1/16A through 6-3/10A, 250VAC, SEMKO Approved 1/16A through 6-3/10A, 250VAC, VDE Approved IEC 127-2 Standard Sheet 3
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 GDG - Time-Delay 250VAC 0.2A Size 5x20 Ferrule

GDG2/10

Miniature fuse GDG - Time-Delay 250VAC 0.2A Size 5x20 Ferrule
SLO-BLO GLASS INDICA H-PACK .500A. 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.

0313.500HXIDP

SLO-BLO GLASS INDICA H-PACK .500A. 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.

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.