Mersen G209421 - The Mersen G209421 is a DIN high voltage fuse base designed for 45mm diameter fuse-links with lengths ranging from 192mm to 537mm. This robust device features an integrated indicating mechanism that triggers an electrical signal during fuse melting, enabling remote circuit opening or indicator activation. Compatible with trip-indicator equipped fuses, it supports microswitch integration for system configuration flexibility. Manufactured by Mersen (SKU: G209421), this US-made component is engineered for high-voltage protection in industrial electrical systems.
Mersen

G209421

Alternate Item Number: SI72V192

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Overview

The Mersen G209421 is a DIN high voltage fuse base engineered for 45mm diameter fuse-links with lengths ranging from 192mm to 537mm, designed to meet DIN 80 standards for high-voltage protection in industrial electrical systems. This robust fuse base features an integrated indicating mechanism that triggers an electrical signal during fuse melting, enabling remote circuit opening or indicator activation. Compatible with trip-indicator equipped fuses, it supports microswitch integration (e.g., MC 4L 2-5 B6 + PRES or MC 4L 2-5 B2 + PRES) for enhanced system configuration flexibility. The G209421 is manufactured in the USA and adheres to German DIN standards, ensuring high dielectric strength and IP2X protection for electrical safety. Ideal for motor feeders, industrial cabinet protection, and high-breaking capacity applications up to 100 kA rms, this fuse base delivers reliable overload and short-circuit protection. Available in multiple current ratings (20A to 400A), the G209421 is a versatile solution for medium-voltage fuse systems, supporting both unipolar and multipolar configurations. Its compact design (45mm diameter) and DIN rail mounting compatibility make it a space-efficient choice for high-voltage distribution panels. The fuse base is designed for use with 6.9kV to 5.08kV ferrule-mounted fuses, including R-rated Amp-Trap series, ensuring compatibility with a wide range of fuse types. With a weight of 110g (packaged in sets of 6) or 150g (packaged in sets of 3), the G209421 balances durability with ease of installation. For applications requiring auxiliary contacts, the G209421 supports fuse blown indication via auxiliary contacts, enhancing system monitoring and maintenance efficiency.
  • DIN 80 compliant high voltage fuse base for 45mm diameter fuse-links (192-537mm lengths)
  • Integrated indicating mechanism triggers electrical signal during fuse melting for remote circuit opening or indicator activation
  • Compatible with trip-indicator equipped fuses and microswitch integration (e.g., MC 4L 2-5 B6 + PRES)
  • Supports high-breaking capacity up to 100 kA rms for overload and short-circuit protection
  • Available in current ratings from 20A to 400A, with IP2X protection for electrical safety

Specifications

AC Voltage Rating
7.2 kV
Brand Name
Mersen
Number Of Poles
1
Series
DIN high voltage fuse-links
Size
15.75 x 2.76 x 10.63 in
Size
400 x 70 x 270 mm
Size
Diameter 45mm, lengths 192, 292, 367, 442, 537mm
Special Features
For indoor and outdoor use
Standard
IEC 60282-1
Sub Brand
Unassigned
Type
IEC HV Fuse Supports
Package Dimensions (L x W x H)
15.75 in x 2.76 in x 10.63 in
Package Dimensions (L x W x H)
400 mm x 70 mm x 270 mm
Package Weight (Imperial)
8.818 lb
Package Weight (Metric)
4.000 kg
Fuse supports, non-disconnecting, are used primarily in potential transformer circuits, or where there is some other disconnecting or isolating device in series with the fuse in the circuit. Disconnecting switch devices have the additional feature of serving to isolate the equipment they protect. It should be noted that disconnecting switches are not load-breaking devices, therefore, the circuit must be open prior to the fuse disconnection. Select either a fuse support or a disconnecting switch for each fuse. Fuse supports and disconnecting switches include live parts for both ends. Both fuse supports and fuse disconnect switches can be mounted vertically or horizontally. The type EK are used for indoor installations while the type EKO are used outdoors. 8250 Volts EKO-1C CEF series.

9F61CEF209

Fuse supports, non-disconnecting, are used primarily in potential transformer circuits, or where there is some other disconnecting or isolating device in series with the fuse in the circuit. Disconnecting switch devices have the additional feature of serving to isolate the equipment they protect. It should be noted that disconnecting switches are not load-breaking devices, therefore, the circuit must be open prior to the fuse disconnection. Select either a fuse support or a disconnecting switch for each fuse. Fuse supports and disconnecting switches include live parts for both ends. Both fuse supports and fuse disconnect switches can be mounted vertically or horizontally. The type EK are used for indoor installations while the type EKO are used outdoors. 8250 Volts EKO-1C CEF series.
SPLICER BLOCK DISTRIBUTION BLOCK 1 POLE. POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.

LS1300-1

SPLICER BLOCK DISTRIBUTION BLOCK 1 POLE. POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.

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.