Mersen J093319 - Miniature Fuses Size 5x20 400V 0.63A High Speed FA Clip Mounting
Mersen

J093319

Alternate Item Number: MI5FA40V0.63


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Specification Sheet

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Overview

Mersen J093319 Miniature Fuses (5x20mm, FA type) deliver ultra-fast overcurrent protection for sensitive semiconductor devices. Rated at 400V and 0.63A, these fuses are designed for clip mounting and provide very fast-acting (FA) response to short circuits and overcurrent events. The 5x20mm form factor ensures compact integration in PCB, power supply, and industrial control systems. With a high breaking capacity, these fuses prevent thermal damage to downstream components, extending system reliability. Ideal for protecting MOSFETs, IGBTs, and other low-energy semiconductor circuits in applications such as power converters, motor drives, and instrumentation. The clip mounting design allows for tool-free installation and easy replacement in DIN rail or panel-mounted enclosures. Compatible with standard fuse holders for 5x20mm fuses, these units meet industrial safety standards and offer long service life under normal operating conditions.
  • Very fast-acting (FA) response for semiconductor protection
  • Rated 400V, 0.63A, 5x20mm miniature fuse
  • Clip mounting for tool-free installation
  • High breaking capacity prevents component damage
  • Compact design for PCB and panel integration

Specifications

Current Rating
0.63 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

Frequently Asked Questions

What is the voltage rating of the J093319 fuse?

The J093319 fuse has a voltage rating of 400V.

What is the current rating of the J093319 fuse?

The J093319 fuse is rated for 0.63A.

What is the fuse type for the J093319?

The J093319 is a very fast-acting (FA) fuse designed for semiconductor protection.

What are the dimensions of the J093319 fuse?

The J093319 fuse has a 5x20mm miniature form factor.

What is the mounting type for the J093319 fuse?

The J093319 fuse uses clip mounting for secure installation.

What applications are suitable for the J093319 fuse?

The J093319 fuse is suitable for protecting sensitive semiconductor devices in power converters, motor drives, and instrumentation.

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.