Mersen J212022 - The D fuse-system is the first generation of screw fuse-system in the german DIN standard. It is still used in many installations. Applications are low voltage ditribution units, where non trained persons are allowed to change the fuse-links. The D fuse range comprises the sizes NDZ, DII, DIII, DIV, DV. The range of applications for D fuse-links is the protection of cables and power lines. They limit and cut-off unacceptable overcurrents and short circuit currents up to their nominal breaking capacity. D fuse-links gG also protect equipments and installations against dynamic effects of high short circuit currents. 500 Volts 63 amps DIII screw gauge ring .
Mersen

J212022

Alternate Item Number: 4086500009053

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Multiplier: 25

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Overview

The Mersen D fuse-system, SKU J212022, represents the first generation of screw fuse-systems adhering to the German DIN standard, ensuring widespread compatibility and continued relevance in numerous installations. This DIII size fuse is specifically engineered for low-voltage distribution units where ease of replacement by non-trained personnel is a critical safety and operational requirement. The D fuse range encompasses sizes NDZ, DII, DIII, DIV, and DV, with this particular DIII model rated for 500 Volts and 63 Amps, featuring a screw gauge ring connection for straightforward installation and maintenance. Its primary application is the robust protection of cables and power lines against unacceptable overcurrents and short-circuit currents, up to its nominal breaking capacity. Beyond simple overcurrent interruption, Mersen D fuse-links, specifically the gG type, are designed to protect equipment and installations from the dynamic effects of high short-circuit currents, mitigating potential damage. The catalog data indicates compatibility with DIN LV FUSE-LINKS D0 systems and NEOZED D0 fuse-bases, supporting its integration into existing infrastructure. The screw gauge ring termination simplifies electrical connections, making it a practical choice for distribution panels and control cabinets. Mersen's commitment to safety and reliability is evident in the design of these fuse-links, providing essential protection for electrical circuits in industrial and commercial settings.
  • First-generation German DIN standard screw fuse-system
  • DIII size, 500V, 63A rating
  • Screw gauge ring connection for easy installation
  • Protects cables, power lines, and equipment from overcurrents
  • Safeguards against dynamic effects of high short-circuit currents

Specifications

Application
protection of cables and power lines
Brand Name
Ferraz Shawmut
Connection Type
Screw Gauge Ring
Current Rating
63 A
Series
D fuse-system
Size
DIII
Standard
DIN VDE 0636-301
Type
DIN LV Fuse-Links D
Voltage Rating
500 VAC
Voltage Rating
500 V V
Package Dimensions (L x W x H)
2.13 IN x 2.13 IN x 0.75 IN
Package Dimensions (L x W x H)
5.4102 cm x 5.4102 cm x 19.05 mm
Package Weight (Imperial)
0.044 L
Package Weight (Metric)
0.020 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.