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Mersen H212021 - DIN Fuse base Size DIII 500VAC 500VDC 63A 1-Pole without touch protection Screw mounting
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Mersen H212021 DIN Fuse base Size DIII 500VAC 500VDC 63A 1-Pole without touch protection Screw mounting

Alternate Item Number: 00072.400000


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Specification Sheet

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Overview

The Mersen H212021 is a single-pole DIN fuse base, size DIII, designed for reliable low-voltage electrical protection. Adhering to German DIN standards, this base is part of the established D fuse-system, making it suitable for installations where fuse-link replacement by non-trained personnel is anticipated. It is rated for 500VAC and 500VDC, with a maximum continuous current carrying capacity of 63A. The H212021 accommodates cable cross-sections from 2.5 mm² to 25 mm², utilizing secure clamp straps with two screws for termination. Its screw mounting design ensures a stable and permanent installation. This DIII size base is ideal for protecting cables and power lines, particularly when used with 'gG' type D fuse-links, which effectively limit and interrupt overcurrents and short-circuit currents. Beyond overcurrent protection, these fuse-links also safeguard equipment from the dynamic forces of high short-circuit currents. The Mersen H212021 (SKU: H212021) offers a compliant and robust solution for essential electrical safety needs in industrial and commercial applications.
  • Mersen DIII size DIN fuse base
  • 1-Pole configuration
  • Rated for 500VAC and 500VDC
  • Maximum current rating of 63A
  • Screw mounting for secure installation

Specifications

AC Voltage Rating
500 V
Amperage Rating
63 A
Application
House incoming units Meter distribution units Distribution cabinets Installation cabinets Fuse boxes
Brand Name
Mersen
Connection Type
Screw Mounting
Current Rating
63A
DC Voltage Rating
500 V
Material
Ceramic
Mounting
Fitted Screw
Mounting Type
Screw Mounting
Number Of Poles
1
Poles
1-pole
Series
D fuse-system
Size
2.87 x 1.81 x 1.89;73 x 46 x 48 in;mm
Size
DIII
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
Voltage Rating
500VAC 500VDC
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)
0.322 lb
Package Weight (Metric)
0.146 kg
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Frequently Asked Questions

What is the voltage rating for D fuse-bases?

The D fuse-bases have a voltage rating of 500 VAC and 500 VDC.

What is the ampere range for D fuse-bases?

The ampere range for D fuse-bases is from 25 A to 63 A.

What sizes are available for the D fuse-range?

The D fuse-range comprises sizes NDZ, DII, DIII, DIV, and DV.

What are the applications for D fuse-links 'gG'?

D fuse-links 'gG' are used for protecting cables and power lines against overcurrents and short circuits.

Are these fuse-bases RoHS compliant?

Yes, the fuse-bases are free of lead, cadmium, mercury, and chrome 6, making them RoHS compliant.

What materials are the contacts made of?

The top and bottom contacts are made of a nickel-plated copper alloy.

What cable cross-sections can be connected to DII fuse-bases?

DII fuse-bases can connect cable cross-sections ranging from 1.5 to 10 mm².

What cable cross-sections can be connected to DIII fuse-bases?

DIII fuse-bases can connect cable cross-sections ranging from 2.5 to 25 mm².

What is the weight of a DII fuse-base with touch protection on DIN rail?

A DII fuse-base with touch protection mounted on a DIN rail weighs 0.12 kg.

What is the weight of a DIII fuse-base without touch protection on DIN rail?

A DIII fuse-base without touch protection mounted on a DIN rail weighs 0.15 kg.

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.