Mersen GSF-V1-1/4 - Miniature fuse GSF-V - Time-Delay 250VAC 1.25A Size 5x20 Soldered connection
Mersen

GSF-V1-1/4

Alternate Item Number: GSF-V1-1/4

UPC: 782001245214


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Overview

The **Mersen GSF-V1-1/4 miniature fuse (SKU: GSF-V1-1/4)** is a high-performance, time-delay fuse designed for critical protection in low-to-medium voltage applications. Engineered with a **ceramic body** and **5x20mm dimensions**, this fuse provides reliable overcurrent protection in compact electronic and electrical systems where space constraints and precision are paramount. **Key Features & Technical Specifications** The GSF-V1-1/4 operates at **250VAC** with a rated current of **1.25A**, making it ideal for sensitive circuits requiring delayed response to transient overloads. Its **time-delay characteristic** ensures temporary surges (e.g., motor startups or capacitor inrush) do not trigger unnecessary interruptions, while still providing robust protection against sustained faults. The **ceramic construction** enhances thermal stability and arc suppression, critical for high-reliability applications in industrial, automotive, and telecommunications environments. **Typical Applications & Industry Use Cases** This fuse is widely deployed in: - **Industrial control panels** where compact form factors and reliable fault protection are essential. - **Telecommunications equipment**, including routers, switches, and base stations, to safeguard sensitive components from voltage spikes. - **Automotive electronics**, such as battery management systems and infotainment units, where space efficiency and thermal performance are critical. - **Power supplies and converters**, including SMPS (Switch-Mode Power Supplies) and DC-DC converters, to protect against short circuits and overloads. - **Consumer electronics**, including appliances, lighting systems, and smart home devices, where miniaturization and safety compliance are required. **Why Choose Mersen for Miniature Fuse Protection?** Mersen, a global leader in electrical protection and thermal management solutions, has built a reputation for engineering fuses that combine **precision, durability, and compliance** with international standards. The **GSF-V series** is part of Mersen’s trusted portfolio of miniature fuses, trusted by engineers worldwide for applications demanding **high interrupting ratings, low let-through energy, and long service life**. **Installation & Selection Considerations** When selecting the **GSF-V1-1/4**, professionals should evaluate: - **Voltage rating compatibility** with the system (250VAC in this case). - **Current rating** (1.25A) to ensure it matches the circuit’s nominal and peak load requirements. - **Time-delay characteristics** to align with the application’s transient handling needs. - **Mounting method**—this model features **soldered axial leads**, making it suitable for through-hole PCB assembly or direct soldering in custom enclosures. - **Environmental conditions**, including operating temperature and vibration resistance, to ensure long-term reliability. **Compliance & Safety Assurance** The GSF-V1-1/4 is designed to meet **IEC 60127-2** standards for miniature fuses, ensuring compliance with global safety and performance requirements. Its **ceramic body** provides superior heat dissipation compared to glass alternatives, reducing the risk of thermal runaway in high-stress environments. Additionally, Mersen’s rigorous quality control processes guarantee consistent performance across batches, minimizing the risk of nuisance tripping or failure. **Why This Fuse Stands Out** Unlike generic miniature fuses, the **Mersen GSF-V1-1/4** offers: - **Superior arc suppression** due to its ceramic construction, reducing the likelihood of catastrophic failure during fault conditions. - **Compact 5x20mm footprint**, enabling integration into densely packed PCBs or tight enclosures. - **Axial lead design** for easy soldering and secure mounting in both automated and manual assembly processes. - **Time-delay functionality** that balances protection with operational continuity, ideal for applications with frequent transient loads. For engineers and procurement teams seeking a **reliable, high-quality miniature fuse** for critical applications, the **Mersen GSF-V1-1/4** delivers uncompromising performance. Whether protecting a high-value industrial control system or a sensitive consumer electronic device, this fuse provides the **safety, precision, and longevity** required in modern electrical design. Trust Mersen—where protection meets innovation.
  • 250VAC rated voltage for low-to-medium voltage systems
  • 1.25A current rating with time-delay for transient overload protection
  • Ceramic body for superior thermal stability and arc suppression
  • 5x20mm compact size with soldered axial leads for PCB mounting
  • IEC 60127-2 compliant for global safety and reliability

Specifications

AC Voltage Rating
250 V
Amperage Rating
1.25 A
Application
Electronic circuits
Brand Name
Mersen
Case
Ceramic
Case Material
Ceramic
Class
Supplemental
Connection
Soldered connection
Connection Type
Soldered Axial Leads
Current Rating
1.25A
Material
Ceramic
Mounting
Surface
Mounting Type
Through-hole PCB Assembly
Series
GSF-V
Size
3.83 x 0.2 in
Size
97.282 x 5.08 mm
Size
3.83 x 0.2;97.282 x 5.08 in;mm
Size
5x20mm
Special Features
Ceramic body Time-delay 5 mm x 20 mm 1-1/2" Axial leads
Standard
1/2A through 8/10A, 250VAC 1A through 6-3/10A, 250VAC, SEMKO, VDE Approved 1A through 10A, 250VAC, UL and CSA Recognized IEC-127-2 Standard Sheet 5
Type
5x20mm
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
3.83 in x 0.2 in x 0.2 in
Package Dimensions (L x W x H)
97.282 mm x 5.08 mm x 5.08 mm
Package Weight (Imperial)
0.010 lb
Package Weight (Metric)
0.005 kg
Miniature fuse GDG-V - Time-Delay 250VAC 1.25A Size 5x20 Soldered connection

GDG-V1-1/4

Miniature fuse GDG-V - Time-Delay 250VAC 1.25A Size 5x20 Soldered connection
250V PICO FUSE 3A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small 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. 250V rating.

263003L

250V PICO FUSE 3A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small 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. 250V rating.

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.