Mersen B216109 - High Speed Fuse-link D D0 RECTICUR Size DII gR 500VAC 440VDC IEC 25A
Mersen

B216109

Alternate Item Number: DIIGR50V25


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Specification Sheet

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Overview

The Mersen DII gR Fuse-link (SKU B216109) is engineered for specialized semiconductor protection within the established German DIN standard. This ultra-fast acting fuse-link is designed for applications where non-trained personnel may need to replace fuses, ensuring safety and operational continuity. It is ideal for safeguarding critical components such as diodes, thyristors, and AC/DC motor drives, particularly in rectifier circuits, as indicated by the 'gR' designation. Rated for 500VAC (IEC) and 440VDC, this 25A fuse-link provides reliable protection against overcurrents. The D system, encompassing sizes DII through DV, remains a prevalent choice in numerous installations due to its proven performance and accessibility. Mersen's commitment to quality ensures dependable operation for power electronics. This specific unit, catalog number 00685.110000, is designed for DIN rail mounting and features touch protection. It connects to cable cross-sections from 1.5 to 10 mm² using clamping yokes and weighs 120g.
  • Mersen DII gR Fuse-link, 25A
  • Rated for 500VAC (IEC) and 440VDC
  • Ultra-fast acting for semiconductor protection
  • Designed for rectifier circuits
  • DIN rail mounting with touch protection

Specifications

AC Voltage Rating
500 V
Amperage Rating
25 A
Brand Name
Mersen
Case
Ceramic
Current Rating
25A
DC Voltage Rating
440 V
Mounting
Clip
Series
D
Size
1.97 x 0.87 in
Size
50 x 22 mm
Size
DII
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
500 V
Wattage
8.2 W
Package Dimensions (L x W x H)
1.97 in x 0.87 in x 0.87 in
Package Dimensions (L x W x H)
50 mm x 22 mm x 22 mm
Package Weight (Imperial)
0.066 lb
Package Weight (Metric)
0.030 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.