Mersen B218156 - 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 grey screw cap with test hole .
Mersen

B218156

Alternate Item Number: 4086500014309

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Multiplier: 10

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Overview

The Mersen D fuse-system (SKU: B218156) is a first-generation screw fuse-link compliant with the German DIN standard, designed for low-voltage distribution units where non-trained personnel can safely replace fuse-links. This DIII size fuse-link provides reliable protection for cables, power lines, and equipment against overcurrents and short-circuit currents up to its nominal breaking capacity. Rated at 500V AC and 63A, it is ideal for industrial and commercial applications requiring robust fault protection. Key features include a grey screw cap with a test hole for easy identification and maintenance, ensuring compliance with DIN 43620 standards. The fuse-link is part of Mersen's D fuse range, which includes sizes NDZ, DII, DIII, DIV, and DV to accommodate diverse power distribution needs. The DIII size is specifically designed for applications requiring 63A current rating, offering a balance of compactness and high breaking capacity. Applications span low-voltage distribution units, control panels, and industrial machinery where user-friendly fuse replacement is essential. The fuse-link's design ensures it can handle dynamic effects of high short-circuit currents, protecting downstream equipment from damage. Mersen's D fuse-system is manufactured in the US and adheres to stringent safety and performance standards, making it a trusted choice for electrical protection in demanding environments.
  • DIN-compliant DIII size fuse-link for low-voltage distribution units
  • 500V AC rated, 63A current rating for robust fault protection
  • Grey screw cap with test hole for easy identification and maintenance
  • Part of Mersen's first-generation D fuse-system range (NDZ, DII, DIII, DIV, DV)
  • Protects cables, power lines, and equipment from overcurrents and short-circuit currents

Specifications

Application
protection of cables and power lines
Brand Name
Ferraz Shawmut
Color
Grey
Connection Type
Screw Cap
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)
1.69 IN x 1.69 IN x 1.69 IN
Package Dimensions (L x W x H)
4.2926 cm x 4.2926 cm x 4.2926 cm
Package Weight (Imperial)
0.084 L
Package Weight (Metric)
0.038 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.