Mersen R077640 - High-Speed Cylindrical Fuse Protistor® Size 10x38 aR 600VAC IEC 0.63A
Mersen

R077640

Alternate Item Number: A060UD0.630T13


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Specification Sheet

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Overview

The Mersen R077640 is a high-speed cylindrical fuse from the Protistor® series, specifically designed for the protection of power semiconductors. This fuse features a 10x38mm form factor and is rated for 600VAC and 0.63A. It adheres to IEC 60269-1 and -4 standards, offering an extremely high breaking capacity of 160 kA. The 'aR' class designation indicates its suitability for full-range protection of semiconductor devices, making it ideal for applications such as inverters and UPS systems. Engineered for rapid response to overcurrents and short circuits, the R077640 safeguards sensitive electronic components from damage. Key specifications include a rated voltage of 600VAC and a current rating of 0.63A. Manufactured in the US, this Mersen Protistor® fuse is recognized for its reliability in critical power applications where robust semiconductor protection is paramount. The compact 10x38mm size ensures compatibility with standard fuse holders.
  • Mersen Protistor® size 10x38 aR cylindrical fuse
  • Rated for 600VAC and 0.63A
  • High-speed protection for power semiconductors
  • IEC 60269-1 and -4 standards compliant
  • Extremely high breaking capacity (160 kA)

Specifications

AC Voltage Rating
600 V
Amperage Rating
0.63 A
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
Mounting
Clip
Size
1.54 x 0.41 in
Size
39.2 x 10.3 mm
Special Features
Voltage rating 500-600 VAC With trip-indicator (1 to 30A), a Mersen speciality (minimum operating voltage for trip-indicator: 20V) Without blown fuse indication 0.10 up to 0.80 A (higher ratings without blown fuse indicator 10x38gRB - 690VAC) aR-Class according to VDE 636-23 IEC 60269-4
Standard
IEC standard 60269-1 IEC standard 60269-4 VDE 636-23
Sub Brand
Protistor®
Type
IEC High-Speed Cylindrical Fuse-Links AC Protection
Voltage Rating
600 V
Wattage
0.9 W
Package Dimensions (L x W x H)
1.54 in x 0.41 in x 0.41 in
Package Dimensions (L x W x H)
39.2 mm x 10.3 mm x 10.3 mm
Package Weight (Imperial)
0.018 lb
Package Weight (Metric)
0.008 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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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.