
Mersen W218151 DIN D Fuse-link gG Size DII 690VAC 20A Color code Blue
Alternate Item Number: DIIIGG69V20
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Multiplier: 25
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Overview
- Rated for 690VAC and 20A with blue color code for easy identification
- gG utilization category for protection against overcurrents and short circuits
- Insulated body with nickel-plated copper alloy contacts for durability
- Low power dissipation and optimized size for efficient performance
- Adheres to German DIN standards for D fuse-system
Specifications
AC Voltage Rating | 690 V |
Amperage Rating | 20 A |
Application | House incoming units Meter distribution units Distribution cabinets Installation cabinets Fuse boxes |
Body Material | Ceramic |
Brand Name | Mersen |
Color | Blue |
Current Rating | 20 A |
Interrupt Rating | 50 kA |
Mounting | Clip |
Series | D fuse-system |
Size | 1.97 x 1.06 in |
Size | 50 x 27 mm |
Size | DII |
Special Features | Insulated body suitable for high mechanical and thermal impacts Top and bottom contacts made of nickel plated copper alloy Safe cut-off short circuits and over currents due to special design of fuse element Clear indication of operation condition due to coloured indicator on top contact Low power dissipation Optimized size Resistant to aging Free of lead, cadmium, mercury, chrome 6 (rohs conformity) |
Standard | DIN VDE 0636-301 |
Type | DIN LV Fuse-Links D |
Voltage Rating | 690 VAC |
Package Dimensions (L x W x H) | 1.97 in x 1.06 in x 1.06 in |
Package Dimensions (L x W x H) | 50 mm x 27 mm x 27 mm |
Package Weight (Imperial) | 0.162 lb |
Package Weight (Metric) | 0.074 kg |

NH00CM32
EUROPEAN STYLE TYPE NH FUSE CM 32A. Littelfuse® European style NH fuse links are designed for the protection of conductors and motors. The gL-gG characteristic fuse links are generally used to protect cables and installation lines from overloads and short-circuits. The aM characteristic fuse links are used for the short-circuit protection of motors and switchgear. They are available in NH00C to NH3 sizes up to 630 amperes.Frequently Asked Questions
What is the fuse-link size for the W218151?
The W218151 is a DII size fuse-link.
Does the W218151 have a visual indicator for operation status?
Yes, the W218151 features a colored indicator on the top contact to show operation condition.
What voltage rating does the W218151 support?
The W218151 supports a voltage rating of 690VAC and 500VDC.
What is the current rating of the W218151?
The current rating of the W218151 is 20A.
What is the color code for the W218151?
The W218151 has a blue color code for identification.
What standards does the W218151 comply with?
The W218151 complies with DIN VDE 0636-301 standards.
What applications is the W218151 suitable for?
The W218151 is suitable for house incoming units, meter distribution units, distribution cabinets, installation cabinets, and fuse boxes.
What is the power dissipation of the W218151?
The W218151 has low power dissipation, though the exact value is not specified in the catalog.
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.





