Mersen GSB2 - Miniature fuse GSB - Fast-Acting 250VAC 2A Size 5x20 Ferrule
Mersen

GSB2

Alternate Item Number: GSB2

UPC: 782001764869


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Overview

The Mersen GSB2 is a fast-acting miniature fuse designed for precise circuit protection in compact electronic and industrial applications. Rated at 2A with a 250VAC voltage rating, this 5x20mm ferrule fuse features a glass body for visual status indication and dimensional stability. The fast-acting characteristic ensures rapid response to overcurrent conditions, protecting sensitive components such as power supplies, control circuits, and telecommunications equipment. Engineered for compatibility with standard 5x20mm fuse holders, the GSB2 meets UL 248-14 and CSA C22.2 No. 248.14 standards, ensuring reliable performance in harsh industrial environments. Its compact design (5x20mm) allows for integration into space-constrained designs, including industrial control panels, consumer electronics, and lighting ballasts. The ferrule terminals provide secure mounting and low-resistance connections, reducing the risk of loose contacts or intermittent failures. With an interrupting rating of 35A RMS at 250VAC, the GSB2 delivers robust protection against short circuits and overloads. The SKU GSB2 is part of Mersen’s GSB series, a trusted line of miniature fuses known for consistent performance and adherence to international safety standards. Ideal for applications requiring fast response and compact form factors, the GSB2 is a cost-effective solution for OEMs and maintenance teams.
  • Fast-acting response for sensitive electronic protection
  • 2A current rating with 250VAC voltage rating
  • 5x20mm ferrule design for secure mounting in standard holders
  • Glass body for visual status indication and dimensional stability
  • UL 248-14 and CSA C22.2 No. 248.14 certified
  • Interrupting rating of 35A RMS at 250VAC
  • Compact 5x20mm size for space-constrained applications
  • Suitable for industrial control panels, power supplies, and telecommunications equipment

Specifications

AC Voltage Rating
250 V
Amperage Rating
2 A
Application
Electronic circuits
Brand Name
Mersen
Case
Glass
Case Material
Glass
Class
Supplemental
Connection
Ferrule
Connection Type
Ferrule
Current Rating
2 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
5x20
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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These Premium Amp-trap French Cylindrical Semiconductor Fuses are an extension of the popular A70QS product line. They are solid-fill 14mm and 22mm fuses IEC rated 690VAC, 200kA Interrupting and 700VDC, 100kA interrupting at 10ms time constant. In addition, these fuses have an 890 VDC rating for capacitor discharge applications up to 2.5ms time constant. All ampere ratings are available with a striker. Applications include small inverter drives and UPS systems, with superior I²t for improved protection and performance. 690 Volts 63 amps.

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.