Mersen S206901 - Miniature Fuses Size 5x20 250V 0.05A High Speed FB Axial Leads Mounting
Mersen

S206901

Alternate Item Number: MI5FBP25V0.05


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Specification Sheet

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Minimum Qty: 2000

Multiplier: 2000

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Overview

Mersen S206901 miniature fuse, 5x20mm size, rated 250V and 0.05A, is a high-speed FA/FB series device designed for ultra-fast overcurrent protection in sensitive electronic circuits. Its axial lead configuration enables direct PCB soldering or component wiring, eliminating the need for additional mounting hardware. The fuse’s very fast-acting response (FA/FB) ensures semiconductor-grade protection against transient overcurrents and short circuits, preventing damage to downstream components like transistors, ICs, and power supplies. With a high breaking capacity, it safely interrupts fault currents up to its rated limits, enhancing system reliability. Compatible with 5x20mm fuse holders and panels, this fuse is ideal for power supplies, test equipment, instrumentation, and industrial control systems where precision protection is critical. The axial leads allow flexible integration into compact designs, while the 250V rating supports global applications. Available in both axial lead and non-leaded versions for versatility.
  • 5x20mm miniature fuse size for compact applications
  • 250V voltage rating with 0.05A current rating
  • FA/FB very fast-acting response for semiconductor protection
  • Axial leads for direct PCB soldering or component wiring
  • High breaking capacity for reliable fault interruption

Specifications

Package Dimensions (L x W x H)
2.99 in x 0.22 in x 0.22 in
Package Dimensions (L x W x H)
76 mm x 5.5 mm x 5.5 mm
Package Weight (Imperial)
0.0030 lb
Package Weight (Metric)
0.0010 kg

Frequently Asked Questions

What is the voltage rating of the S206901 fuse?

The S206901 fuse has a voltage rating of 250V.

What is the current rating of the S206901 fuse?

The S206901 fuse is rated for 0.05A.

What does FA/FB mean in the fuse series?

FA/FB indicates the fuse operates in the very fast-acting range, providing rapid overcurrent protection for sensitive components.

Can the S206901 fuse be mounted directly on a PCB?

Yes, the S206901 has axial leads designed for direct soldering onto printed circuit boards.

What is the fuse size for the S206901?

The S206901 is a 5x20mm miniature fuse.

Is the S206901 fuse available without axial leads?

Yes, Mersen offers the same fuse in a version without axial leads for alternative mounting options.

What applications are suitable for the S206901 fuse?

The S206901 is suitable for power supplies, test equipment, instrumentation, and industrial control systems requiring fast overcurrent protection.

What is the breaking capacity of the S206901 fuse?

The fuse has a high breaking capacity to safely interrupt fault currents up to its rated limits.

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.