Mersen AJT250/600EIB - AJT Reducer Fuses are a safe permanent solution for decreasing your current rating without using a fuse reducer which are designed and list for temporary use only. These reducer fuses provide the same trusted protection levels as a traditional AJT fuses but in a larger body.
Mersen

AJT250/600EIB

Alternate Item Number: 782001471941

UPC: 782001471941

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Overview

Mersen's AJT250/600EIB Reducer Fuses provide a permanent, reliable solution for reducing current ratings in industrial electrical systems. Unlike temporary fuse reducers, which are designed for short-term use and can compromise safety, these fuses deliver the same high level of protection as traditional AJT fuses while accommodating a larger body design. Engineered by Mersen, a global leader in electrical protection solutions, the AJT250/600EIB fuses are built to meet the rigorous demands of modern industrial applications, ensuring consistent performance and long-term operational safety. These reducer fuses are ideal for applications where precise current control is critical, such as in power distribution panels, motor control centers, and industrial machinery. By eliminating the need for temporary fuse reducers, which are often used as a stopgap measure, Mersen's AJT250/600EIB fuses provide a permanent and safer alternative. This not only enhances system reliability but also reduces maintenance costs and downtime associated with frequent fuse replacements. The AJT250/600EIB fuses are designed to integrate seamlessly with existing AJT fuse systems, offering a drop-in replacement that maintains compatibility with standard fuse holders and enclosures. Their larger body design ensures that the reduced current rating is effectively managed, preventing overheating and ensuring optimal performance. This makes them particularly suitable for high-demand environments where electrical systems are subjected to continuous operation and varying load conditions. Mersen's reputation for innovation and quality in electrical protection solutions is well-established, with a track record of delivering products that meet or exceed industry standards. The AJT250/600EIB fuses are no exception, offering a combination of durability, reliability, and performance that is trusted by professionals across industries such as manufacturing, energy, and infrastructure. Whether you are upgrading an existing system or designing a new installation, these fuses provide the peace of mind that comes with knowing your electrical protection is in capable hands. Key benefits of the Mersen AJT250/600EIB Reducer Fuses include: - **Permanent current rating reduction** – Unlike temporary solutions, these fuses provide a long-term fix for current rating adjustments. - **Enhanced safety** – Designed to meet the same high protection standards as traditional AJT fuses, ensuring reliable operation in demanding conditions. - **Compatibility** – Seamlessly integrates with existing AJT fuse systems, reducing installation complexity and costs. - **Durability** – Built to withstand harsh industrial environments, providing consistent performance over time. - **Cost efficiency** – Reduces maintenance and replacement costs by eliminating the need for temporary fuse reducers. For professionals seeking a dependable and permanent solution for current rating reduction, the Mersen AJT250/600EIB Reducer Fuses are the clear choice. With their trusted protection levels and robust design, they offer a superior alternative to temporary solutions, ensuring your electrical systems operate safely and efficiently for years to come.
  • Permanent current rating reduction without temporary fuse reducers
  • Same trusted protection as traditional AJT fuses in a larger body design
  • Ideal for power distribution panels, motor control centers, and industrial machinery
  • Seamless integration with existing AJT fuse systems
  • Durable and reliable for harsh industrial environments

Specifications

Package Dimensions (L x W x H)
8 IN x 2.5 IN x 2.5 IN
Package Dimensions (L x W x H)
20.32 cm x 6.35 cm x 6.35 cm
Package Weight (Imperial)
3.450 L
Package Weight (Metric)
1.565 kg
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.