Mersen GSC1-1/2 - Miniature fuse GSC - Time-Delay 250VAC 1.5A Size 5x20 Ferrule
Mersen

GSC1-1/2

Alternate Item Number: GSC1-1/2

UPC: 782001765767

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Multiplier: 5

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Overview

The Mersen GSC1-1/2 miniature time-delay fuse (SKU: GSC1-1/2) is a high-performance protection component engineered for critical industrial and commercial applications where transient overloads are common. Designed to meet stringent IEC and UL standards, this 5x20mm ferrule-type fuse provides reliable circuit protection at up to 250VAC with a rated current of 1.5A. The time-delay characteristic ensures that brief inrush currents—such as those from motor starts or capacitor charging—do not prematurely interrupt operations, while still offering robust fault protection during sustained overloads. Constructed with a durable glass/ceramic body, the GSC1-1/2 fuse delivers exceptional thermal and mechanical stability, making it ideal for harsh environments. The ferrule terminals ensure secure, low-resistance connections in compact panel designs, reducing installation time and improving system reliability. Mersen’s reputation for precision engineering and rigorous quality control ensures consistent performance across applications, from power supplies and control panels to instrumentation and lighting systems. Selecting the right miniature fuse requires balancing voltage rating, current rating, and response time with the specific demands of the application. The GSC1-1/2’s 1.5A rating and time-delay profile make it particularly well-suited for sensitive electronics, where nuisance tripping must be avoided without compromising safety. Common use cases include industrial automation, telecommunications equipment, and medical devices, where operational continuity is paramount. Installation is straightforward: the fuse is inserted into a compatible fuse holder or panel mount, ensuring proper alignment to prevent arcing or poor contact. Regular inspection of the fuse body for cracks or discoloration is recommended, as these can indicate potential failure. Mersen’s global manufacturing footprint and adherence to international standards (including CE, RoHS, and REACH compliance) provide additional assurance of reliability and longevity. For professionals seeking a trusted, high-quality miniature fuse, the Mersen GSC1-1/2 combines performance, durability, and compliance in a compact 5x20mm package. Whether protecting sensitive circuits or ensuring compliance with safety regulations, this fuse delivers the dependability required in modern industrial and commercial systems.
  • Rated for 250VAC with 1.5A current capacity
  • Time-delay design prevents nuisance tripping from transient inrush currents
  • Glass/ceramic body ensures thermal and mechanical durability
  • 5x20mm ferrule terminals for secure, low-resistance connections
  • Compliant with IEC, UL, CE, RoHS, and REACH standards

Specifications

AC Voltage Rating
250 V
Amperage Rating
1.5 A
Application
Electronic circuits
Brand Name
Mersen
Case
Glass / Ceramic
Class
Supplemental
Connection
Ferrule
Connection Type
Ferrule
Current Rating
1.5A
Material
Glass/Ceramic
Mounting
Clip
Series
GSC
Size
0.79 x 0.2 in
Size
20.066 x 5.08 mm
Size
5x20mm
Special Features
Glass / ceramic body Time-delay 5 mm x 20 mm
Standard
1/10A through 3A, 250VAC, UL Listed and CSA Certified 4A through 8A, 125VAC, UL Listed and CSA Certified 10A, 125VAC, UL and CSA 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.