Mersen F201255 - High Speed Fuse-link D D0 RECTICUR Size D02 gR 440VAC 440VDC IEC 35A
Mersen

F201255

Alternate Item Number: D02GR44V35


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Specification Sheet

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Overview

The Mersen F201255 D0 RECTICUR high-speed fuse-link (SKU: F201255) is a Type D02 cylindrical fuse designed for semiconductor protection in industrial applications. Rated for 440V AC/DC, this gR-rated fuse-link provides ultra-fast response to protect sensitive components such as diodes, thyristors, and AC/DC motor drives. The D0 system, compliant with German DIN standards, is the most modern screw-type fuse system in its class, offering sizes D01, D02, and D03 with current ratings from 2A to 100A. Key specifications include a rated breaking capacity of 200kA, power dissipation of 4W at 35A, and a compact Size D02 footprint. The fuse-link is designed for use in environments where non-trained personnel may handle fuse replacement, ensuring safety without compromising performance. Typical applications include rectifier circuits, power conversion systems, and motor drive protection where fast-acting fault interruption is critical to prevent damage to semiconductor devices. Manufactured by Mersen in the US, the F201255 meets IEC standards for high-speed fuse-links, providing reliable overcurrent protection in both AC and DC circuits up to 440V. Its gR classification indicates it is optimized for rectifier applications, offering precise I²t characteristics for semiconductor-grade protection.
  • Rated for 440V AC/DC operation with 200kA breaking capacity
  • gR-rated for ultra-fast semiconductor protection (diodes, thyristors, motor drives)
  • Size D02 cylindrical fuse-link, part of the modern DIN D0 system (D01/D02/D03)
  • 4W power dissipation at 35A, compact design for easy installation
  • IEC compliant, designed for safe handling by non-trained personnel

Specifications

AC Voltage Rating
440 V
Amperage Rating
35 A
Brand Name
Mersen
Case
Ceramic
Current Rating
35A
DC Voltage Rating
440 V
Mounting
Clip
Series
RECTICUR
Size
1.42 x 0.6 in
Size
36 x 15.3 mm
Size
D02
Special Features
Insulated body suitable for high mechanical and thermal impacts Top and bottom contacts made of nickel-plated/silver-plated copper alloy Safe cut off short circuits and over currents due special design of fuse element Clear indication of operation condition due coloured indicator on top contact Low power dissipation Optimized size Resistant to aging
Standard
IEC 60 269-4 DIN EN 60269-4 (VDE 0636-4) DIN VDE 0636-3
Type
IEC High-Speed D & D0 Fuse-Links AC-DC Protection
Voltage Rating
440 V
Wattage
8.4 W
Package Dimensions (L x W x H)
1.42 in x 0.6 in x 0.6 in
Package Dimensions (L x W x H)
36 mm x 15.3 mm x 15.3 mm
Package Weight (Imperial)
0.029 lb
Package Weight (Metric)
0.013 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.