Mersen AJT600EIB - Amp-Trap 2000 time-delay AJT fuses provide IEC Type "2" (No Damage) protection to main, feeder, and branch-circuits, for all types of loads - yet, they require only half the mounting space needed for 600V UL Class RK fuses. Time-delay characteristics handle motor in-rush currents without nuisance trips. Its current-limiting ability and wide range of ratings provide excellent overcurrent protection for all your applications. An optional mechanical blown fuse indicator and Microswitch is available on blade-type (70 to 600A) fuses for visual and/or remote blown fuse indication. 600 Volts 600 amps with offset EI indicator for microswitch mounting.
Mersen

AJT600EIB

Alternate Item Number: 782001200893

UPC: 782001200893

Contact for Pricing

Overview

The Mersen Amp-Trap 2000 AJT600EIB is a 600V, 600A time-delay fuse designed for IEC Type 2 (No Damage) protection in main, feeder, and branch circuits. This fuse delivers superior overcurrent protection while occupying only half the mounting space of traditional 600V UL Class RK fuses, enabling more compact and cost-effective panel designs. Its advanced time-delay characteristics effectively manage motor in-rush currents and transformer loads, preventing nuisance trips and ensuring continuous operation. The AJT600EIB features a 300kA interrupting rating (self-certified, UL witnessed) and superior current-limiting performance, reducing peak let-thru current for enhanced arc flash safety. Optional mechanical blown fuse indicators and microswitches (for 70-600A blade-type fuses) provide visual or remote indication of blown fuses, improving operational efficiency. The fuse body is constructed from fiberglass for dimensional stability in harsh industrial environments, with high-grade silica filler for rapid arc quenching. Unique Class J dimensions prevent replacement errors, while the high-visibility orange label ensures brand recognition and traceability via metal-embossed date and catalog numbers. Approved to UL 248-8, CSA C22.2 No. 248.8, and IEC 60269-2-1 standards, the AJT600EIB is ideal for motor circuits, mains, feeders, branch circuits, transformers, control panels, and bus ducts.
  • 600V AC/DC, 600A rating with 300kA interrupting rating (self-certified, UL witnessed)
  • IEC Type 2 (No Damage) protection for main, feeder, and branch circuits
  • Time-delay design handles motor in-rush currents without nuisance trips
  • Superior current-limiting reduces peak let-thru current for arc flash safety
  • Optional blown fuse indicator/microswitch for visual/remote indication (70-600A models)
  • Half the mounting space of traditional 600V UL Class RK fuses
  • Fiberglass body with high-grade silica filler for harsh industrial environments
  • UL 248-8, CSA C22.2 No. 248.8, and IEC 60269-2-1 certified

Specifications

Amperage Rating
600 A
Application
Motor Circuits Mains Feeders Branch Circuits Lighting Heaters Transformers Control Panels Circuit Breaker Back-up Bus Duct Load Centers
Brand Name
Ferraz Shawmut
Class
Class J
Connection
Blade
Interrupt Rating
200 kA
Mounting
Clip
Special Features
Solid-state SmartSpot indicator Time-delay for motor starting and transformer inrush 300kA interrupting rating, self-certified (UL witnessed) Extremely current-limiting for low peak let-thru current Most current-limiting UL class fuse Small footprint requires less mounting space and allows smaller, more economical fuse blocks Easy 2-to-1 selectivity for prevention of nuisance shutdowns Unique Class J dimensions prevent replacement errors High-visibility orange label gives instant recognition Metal embossed date and catalog number for traceability and lasting identification Fiberglass body provides dimensional stability in harsh industrial settings High-grade silica filler ensures fast arc quenching Optional EI blown fuse indicator/switch available
Standard
UL Listed to Standard 248-8, File E2137 DC Listed to UL Standard 248 CSA Certified to Standard C22.2, No. 248.8 IEC 269-2-1
Sub Brand
Amp-Trap® 2000, SmartSpot®
Type
North American Power Fuses
Type Of Indicators
SmartSpot, EI
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
8.75 IN x 2.5 IN x 2.5 IN
Package Dimensions (L x W x H)
22.225 cm x 6.35 cm x 6.35 cm
Package Weight (Imperial)
3.500 L
Package Weight (Metric)
1.588 kg
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Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

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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.