Mersen K084005 - Miniature Fuses Size 5x20 250V 1.25A High Speed FA Clip Mounting
Mersen

K084005

Alternate Item Number: MI5FA25V1.25


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Specification Sheet

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Multiplier: 50

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Overview

Mersen’s K084005 miniature fuse (SKU: K084005) is a 5x20mm, 250V-rated, 1.25A FA-series fuse designed for fast-acting overcurrent protection in sensitive electronic circuits. Built for clip mounting, this fuse provides rapid response to fault conditions, safeguarding semiconductor devices, measuring instruments, and control apparatus from damage caused by short circuits or transient overcurrents. The FA/FB design ensures very high breaking capacity, minimizing the risk of catastrophic failure in power supplies, instrumentation, and automation systems. Compatible with 125V–250V systems, the K084005 delivers reliable performance in compact form factors where space and precision are critical. High-quality materials ensure consistent operation across industrial, commercial, and laboratory environments. Available with axial leads for flexible installation options.
  • 5x20mm miniature fuse size for compact installations
  • 250V voltage rating with 1.25A current rating
  • FA-series design for very fast-acting overcurrent protection
  • Clip mounting type for secure and easy installation
  • High breaking capacity to prevent damage in sensitive electronics

Specifications

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
One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.

LCMA6-8-C

One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.
JB5-2 2 POLE JUMPER 5.2MM SPACING

1SNK905302R0000

JB5-2 2 POLE JUMPER 5.2MM SPACING
JB5-5 5 POLE JUMPER 5.2MM SPACING

1SNK905305R0000

JB5-5 5 POLE JUMPER 5.2MM SPACING
Ground Lug

DNGL

Ground Lug
RELEASE UNDERVOLTAGE BS DWB400 D70

BS DWB400D70

RELEASE UNDERVOLTAGE BS DWB400 D70
LUG LT1A-UBW800

LT1A-UBW800

LUG LT1A-UBW800

Frequently Asked Questions

What is the voltage rating of the K084005 fuse?

The K084005 fuse has a voltage rating of 250V.

What is the current rating for this fuse?

The current rating is 1.25 amperes.

What mounting type does the K084005 use?

The K084005 uses clip mounting for secure attachment.

What is the fuse size?

The fuse size is 5x20 millimeters.

What is the series of this fuse?

The fuse belongs to the FA/FB series.

Is this fuse suitable for semiconductor protection?

Yes, the FA-series design provides fast-acting protection for semiconductors.

Does this fuse support 125V systems?

Yes, the K084005 is rated for both 125V and 250V systems.

Can this fuse be used with axial leads?

Yes, the K084005 range is available with axial leads.

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.