Mersen A085445 - Miniature Fuses Size 6.3x32 500V 6.3A High Speed FA Clip Mounting
Mersen

A085445

Alternate Item Number: MI6FA50V6.3


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Specification Sheet

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Overview

Mersen's A085445 miniature fuse (6.3x32mm) is a high-speed FA (very fast-acting) fuse rated at 500V and 6.3A, designed for critical protection of sensitive semiconductor devices and electronic components. Its compact 6.3x32mm form factor and clip mounting system enable easy integration into space-constrained industrial and electronic systems. The FA design ensures rapid response to overcurrent conditions, minimizing thermal stress and preventing catastrophic failure in power supplies, converters, and control circuits. With a high breaking capacity, this fuse reliably interrupts fault currents up to its specified rating, safeguarding downstream components from damage. Available in both clip-mount and axial lead configurations, the A085445 supports versatile installation options for DIN rail, PCB, or chassis mounting. Manufactured by Mersen, a leader in electrical protection solutions, this fuse delivers consistent performance in applications requiring precise overcurrent protection, including power electronics, motor drives, and renewable energy systems. The 500V rating ensures compatibility with medium-voltage industrial circuits, while the 6.3A current rating provides targeted protection for low-to-medium power semiconductor devices.
  • 6.3x32mm miniature fuse size for compact installations
  • 500V voltage rating for medium-voltage industrial circuits
  • 6.3A current rating with very fast-acting (FA) response
  • High breaking capacity for reliable fault current interruption
  • Clip mounting standard; axial lead version available

Specifications

Connection Type
clip mounting
Current Rating
6.3 A
Mounting Type
Clip Mounting
Series
6x32 FA
Size
6.3x32
Voltage Rating
500 V V
Package Dimensions (L x W x H)
1.26 in x 0.25 in x 0.25 in
Package Dimensions (L x W x H)
32 mm x 6.3 mm x 6.3 mm
Package Weight (Imperial)
0.0060 lb
Package Weight (Metric)
0.0020 kg

Frequently Asked Questions

What is the voltage rating of the A085445 fuse?

The A085445 fuse has a voltage rating of 500V, suitable for medium-voltage industrial applications.

What current rating does the A085445 fuse have?

The A085445 fuse is rated at 6.3A, providing targeted overcurrent protection for sensitive components.

What does FA mean in the fuse specification?

FA stands for very fast-acting, indicating the fuse responds rapidly to overcurrent conditions to protect semiconductors.

What are the dimensions of the A085445 fuse?

The A085445 fuse measures 6.3mm in diameter and 32mm in length, fitting standard miniature fuse holders.

Is the A085445 fuse available with axial leads?

Yes, the A085445 fuse is available with axial leads in addition to the standard clip mounting configuration.

What is the breaking capacity of the A085445 fuse?

The A085445 fuse offers a high breaking capacity, ensuring reliable interruption of fault currents up to its rated value.

Where can the A085445 fuse be mounted?

The A085445 fuse supports clip mounting for DIN rail, PCB, or chassis installations, with axial lead versions for flexible wiring.

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.