Mersen 9F61AHM205 - 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. 25800 Volts EK-3C AHM series.
Mersen

9F61AHM205

Alternate Item Number: 9F61AHM205

UPC: 782001398514

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Overview

The Mersen 9F61AHM205 is a non-disconnecting fuse support designed for critical applications within medium voltage electrical systems. Primarily utilized in potential transformer circuits or where an independent isolating device is present, this support ensures reliable fuse retention and circuit integrity. Manufactured by Mersen, a leader in electrical protection, this specific model is part of the EK-3C AHM series, rated for 25800 Volts (25.8kV) and suitable for indoor installations. Key features include its robust construction, capable of accommodating fuses with a C/2.00" ferrule diameter and a 21" length. The 9F61AHM205 is designed for versatility, allowing for both vertical and horizontal mounting configurations to suit diverse panel layouts and space constraints. It includes live parts for both ends, ensuring secure electrical contact. This fuse support is engineered to work in conjunction with other disconnecting or isolating devices, as it is not a load-breaking device itself. The circuit must be open before fuse disconnection. Specifications: - SKU: 9F61AHM205 - Manufacturer: Mersen - Voltage Rating: 25.8 kV (25800 Volts) - Type: EK (Indoor) - Series: AHM - Fuse Size: C (2.00" ferrule diameter) - Fuse Length: 21" - Mounting: Vertical or Horizontal - Application: Potential transformer circuits, systems with separate isolating devices. This Mersen fuse support is a crucial component for maintaining the safety and operational continuity of medium voltage electrical infrastructure. Its design prioritizes secure fuse holding and electrical connectivity, making it an essential choice for engineers and technicians requiring dependable fuse protection solutions. For detailed installation and maintenance information, refer to Mersen's technical documentation.
  • Mersen 9F61AHM205 non-disconnecting fuse support
  • Rated for 25.8kV (25800 Volts) for indoor installations
  • Accommodates C/2.00" ferrule diameter and 21" fuse length
  • Supports vertical and horizontal mounting
  • Designed for potential transformer circuits and systems with isolating devices

Specifications

AC Voltage Rating
25.8 kV
Application
Utilities Industrial Plants Hospitals Shopping Centers Schools Office Buildings
Brand Name
Mersen
Connection
Bus
Material
Fiberglass Reinforced Polyester
Mounting
Screw
Number Of Poles
1
Size
32 x 6 x 36.5 in
Size
812.8 x 152.4 x 927.1 mm
Type
IEEE MV Fuse Supports
Voltage Rating
25800 VAC
Package Dimensions (L x W x H)
32 in x 6 in x 36.5 in
Package Dimensions (L x W x H)
812.8 mm x 152.4 mm x 927.1 mm
Package Weight (Imperial)
76.000 lb
Package Weight (Metric)
34.473 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. 25800 Volts EK-1D AHM series.

9F61AHM301

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. 25800 Volts EK-1D AHM series.
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LCH133-1

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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.