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Mersen M093345 - Miniature Fuses Size 5x20 400V 2.5A High Speed FA Clip Mounting
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Mersen M093345 Miniature Fuses Size 5x20 400V 2.5A High Speed FA Clip Mounting

Alternate Item Number: MI5FA40V2.5


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Specification Sheet

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Minimum Qty: 50

Multiplier: 50

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

Mersen’s Miniature Fuse Size 5x20 FA Clip Mounting (SKU: M093345) is a high-speed, 400V-rated fuse designed for precise overcurrent and short-circuit protection in sensitive electronic circuits. With a 2.5A current rating and very fast-acting (FA) response, it safeguards semiconductor devices, power supplies, and control systems from transient faults that could cause catastrophic failure. The 5x20mm cylindrical form factor allows direct clip mounting, simplifying installation in compact enclosures or PCB-mounted fuse holders. Rated for 400V AC/DC operation, this fuse meets stringent industrial and commercial standards for reliability in power distribution, instrumentation, and automation applications. Its high breaking capacity ensures interruption of fault currents without arcing or damage to surrounding components, reducing downtime and maintenance costs. Compatible with standard fuse blocks and holders, the M093345 is a cost-effective solution for protecting low-voltage electronics where fast response is critical. Manufactured by Mersen, this fuse is built to deliver consistent performance in harsh environments, including high-temperature or vibration-prone installations. The FA designation confirms its suitability for protecting components like MOSFETs, IGBTs, and microcontrollers from inrush currents or fault conditions.
  • High-speed (FA) response for semiconductor protection
  • 400V AC/DC voltage rating
  • 2.5A current rating with 5x20mm cylindrical form factor
  • Clip mounting for direct installation in compact enclosures
  • Suitable for MOSFETs, IGBTs, and microcontrollers

Specifications

Connection Type
clip mounting
Current Rating
2.5 A
Mounting Type
Clip Mounting
Series
FA
Size
5x20
Voltage Rating
400 V
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 mm x 5 mm x 5 mm
Package Weight (Imperial)
0.0030 lb
Package Weight (Metric)
0.0010 kg
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Frequently Asked Questions

What is the ampere range for the 5x20 FA fuses?

The ampere range for these fuses is from 0.1A to 4A.

What is the rated voltage for these miniature fuses?

The rated voltage for these 5x20 FA miniature fuses is 400V AC.

What is the ampere range for the 5x20 FA fuses?

The ampere range for these fuses is from 0.1A to 4A.

What is the rated voltage for these miniature fuses?

The rated voltage for these 5x20 FA miniature fuses is 400V AC.

What is the breaking capacity of these fuses?

These fuses have a breaking capacity of 10 kA.

What is the breaking capacity of these fuses?

These fuses have a breaking capacity of 10 kA.

What type of protection do these fuses offer?

These fuses offer fast protection for sensitive electronic components and safeguard semiconductor devices from overcurrent and short circuits.

What type of protection do these fuses offer?

These fuses offer fast protection for sensitive electronic components and safeguard semiconductor devices from overcurrent and short circuits.

How are these fuses packaged?

These fuses are packaged in boxes of 50 pieces.

What are the dimensions of these miniature fuses?

The dimensions of these fuses are 5x20mm.

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.