Mersen K218670 - DIN Fuse base Size DII 500VAC 500VDC 25A 1-Pole without touch protection Screw mounting
Mersen

K218670

Alternate Item Number: 00081.100000


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Overview

The Mersen K218670 DIN Fuse Base (Size DII) is a first-generation screw-mount fuse base compliant with German DIN standards, designed for low-voltage distribution units where non-technical personnel may replace fuse-links. This 1-pole base supports rated currents up to 25A and operates reliably at both 500V AC and 500V DC, making it suitable for industrial and commercial applications. Engineered for compatibility with common wiring sizes, the K218670 features clamping yokes for secure cable termination with cross-sections from 1.5 mm² to 10 mm². As part of Mersen’s D fuse-system, this base protects cables, power lines, and equipment by interrupting overcurrents and short-circuit currents up to its nominal breaking capacity. The absence of touch protection simplifies installation and replacement in controlled environments while maintaining compliance with IEC standards. Ideal for retrofits or new installations in panelboards, distribution boards, and control cabinets where space efficiency and reliable fault protection are critical.
  • Rated current: 25A; Voltage: 500V AC/DC
  • Size DII, 1-pole, screw mounting
  • Cable termination: 1.5 mm² to 10 mm²
  • Clamping yokes for secure connections
  • No touch protection for simplified installation

Specifications

AC Voltage Rating
500 V
Amperage Rating
25 A
Application
House incoming units Meter distribution units Distribution cabinets Installation cabinets Fuse boxes
Brand Name
Mersen
DC Voltage Rating
500 V
Material
Ceramic
Mounting
Fitted Screw
Number Of Poles
1
Size
2.87 x 1.81 x 1.89;73 x 46 x 48 in;mm
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 0636-3
Type
IEC D0 & D Fuse Bases
Voltage Rating
500 VAC
Package Dimensions (L x W x H)
2.87 in x 1.81 in x 1.89 in
Package Dimensions (L x W x H)
73 mm x 46 mm x 48 mm
Package Weight (Imperial)
0.220 lb
Package Weight (Metric)
0.100 kg
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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.