Mersen 9F61CEF410 - 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-3DD CEF series.
Mersen

9F61CEF410

Alternate Item Number: 9F61CEF410

UPC: 782001400101

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Overview

Mersen 9F61CEF410 EKO-3DD fuse supports are non-disconnecting, outdoor-rated components designed for medium-voltage potential transformer circuits up to 8250V. These fuse supports provide secure mounting and electrical connection for current-limiting fuses in series with disconnecting or isolating devices, ensuring reliable circuit protection. The EKO-3DD series features a ferrule diameter of 3 inches (DD configuration for parallel 3-inch barrels) and is optimized for horizontal or vertical mounting in outdoor installations. Unlike disconnecting switches, these fuse supports do not break load current; the circuit must be de-energized prior to fuse removal. The 9F61CEF410 is part of Mersen's 9F61 series, which spans fuse sizes from B (1-9/16 inches) to EE (two 4-inch barrels in parallel), offering compatibility with a wide range of medium-voltage fuses. Key applications include potential transformer circuits, sub-combiners, array combiners, master combiners, inverter DC inputs, and battery charge controllers. The product includes live parts for both ends, ensuring full electrical connectivity. For detailed mounting, storage, and maintenance instructions, refer to Mersen document INST-EK39196. The 9F61CEF410 is manufactured in the US and distributed by Gross Automation.
  • Non-disconnecting fuse support for outdoor installations up to 8250V
  • Supports 3-inch ferrule fuses in parallel (DD configuration)
  • Mountable vertically or horizontally for flexible installation
  • Live parts included for both ends of the fuse
  • Compatible with Mersen current-limiting fuses in series with isolating devices

Specifications

AC Voltage Rating
8.25 kV
Application
Utilities Industrial Plants Hospitals Shopping Centers Schools Office Buildings
Brand Name
Mersen
Connection
Bus
Material
Porcelain
Mounting
Screw
Mounting Type
Vertical or Horizontal
Series
CEF
Size
21 x 4 x 28.25 in
Size
533.4 x 101.6 x 717.55 mm
Type
IEEE MV Fuse Supports
Voltage Rating
8250 VAC
Package Dimensions (L x W x H)
21 in x 4 in x 28.25 in
Package Dimensions (L x W x H)
533.4 mm x 101.6 mm x 717.55 mm
Package Weight (Imperial)
70.000 lb
Package Weight (Metric)
31.751 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.
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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.