Mersen AJT2-8/10 - 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 2.8 amps .
Mersen

AJT2-8/10

Alternate Item Number: AJT2-8/10

UPC: 782001962791

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Overview

The Mersen AJT2-8/10 Amp-Trap 2000 time-delay fuse is engineered to deliver superior IEC Type 2 (No Damage) protection for critical industrial electrical systems. This 600V, 2.8A fuse is designed for main, feeder, and branch circuits, providing robust overcurrent protection for a wide array of load types. Its advanced time-delay characteristics are specifically calibrated to effectively manage motor and transformer inrush currents, thereby preventing nuisance tripping and ensuring operational continuity. This feature is paramount in applications where transient current surges are common, such as motor startups or transformer energization. Mersen's Amp-Trap 2000 series fuses, including the AJT2-8/10, are renowned for their current-limiting capabilities. This means they can significantly reduce the magnitude and duration of fault currents, thereby minimizing damage to downstream equipment and personnel. With an impressive interrupting rating of 200kA I.R. AC and 100kA I.R. DC (self-certified for 600VAC to 300kA I.R., UL witnessed), these fuses offer a high level of safety and reliability in fault conditions. Furthermore, their unique Class J dimensions ensure that they cannot be incorrectly installed in fuse blocks designed for other fuse classes, preventing potentially hazardous misapplications. A key advantage of the AJT2-8/10 is its compact footprint, requiring only half the mounting space of comparable 600V UL Class RK fuses. This space-saving design allows for smaller, more cost-effective fuse blocks and panel designs, which is a significant consideration in space-constrained industrial environments. The fuse also boasts a high-visibility orange label for instant brand recognition and metal-embossed date and catalog numbers for permanent traceability and identification. For enhanced operational visibility, the AJT series offers an optional SmartSpot visual blown fuse indicator, providing immediate visual confirmation of a tripped fuse. For applications requiring remote monitoring, an optional Microswitch is available on blade-type fuses (70 to 600A), enabling both visual and/or remote blown fuse indication. This fuse is UL listed to standard 248-8 (File E2137) and CSA certified to standard C22.2 No. 248.8, adhering to stringent industry safety and performance standards. Its fiberglass body provides dimensional stability in harsh industrial settings, and the high-grade silica filler ensures fast and effective arc quenching. Key Features and Benefits: * **IEC Type 2 (No Damage) Protection:** Safeguards equipment from damage during overcurrent events. * **Time-Delay Characteristics:** Effectively handles motor and transformer inrush currents, preventing nuisance trips. * **Superior Current-Limiting Ability:** Minimizes fault current let-through, protecting downstream components. * **Compact Footprint:** Requires less mounting space compared to traditional RK fuses, enabling smaller panel designs. * **High Interrupting Rating:** 200kA I.R. AC / 100kA I.R. DC (self-certified to 300kA I.R. AC, UL witnessed). * **Optional SmartSpot Indicator:** Provides visual blown fuse indication. * **Optional Microswitch:** Enables remote blown fuse monitoring. * **Unique Class J Dimensions:** Prevents incorrect fuse replacement. * **Durable Construction:** Fiberglass body and high-grade silica filler for reliability in demanding environments. Applications for the Mersen AJT2-8/10 include motor circuits, mains, feeders, branch circuits, lighting, heating, general loads, transformers, control panels, circuit breaker back-up, bus duct, and load centers. Its versatility and robust protection make it an ideal choice for a wide range of industrial and commercial electrical installations.
  • Mersen Amp-Trap 2000 time-delay AJT fuse for IEC Type 2 (No Damage) protection.
  • 600V AC / 500V DC rating with 2.8A current capacity.
  • Designed for motor circuits, mains, feeders, and branch circuits.
  • Time-delay characteristics prevent nuisance trips from inrush currents.
  • High current-limiting ability and 200kA interrupting rating for superior protection.

Specifications

AC Voltage Rating
600 V
Amperage Rating
2.8 A
Application
Motor circuits Mains Feeders Branch circuits Lighting, heating & general loads Transformers Control panels Circuit breaker back-up Bus duct Load centers
Application
Motor Circuits Mains Feeders Branch Circuits Lighting Heaters Transformers Control Panels Circuit Breaker Back-up Bus Duct Load Centers
Body Material
GMG
Brand Name
Ferraz Shawmut
Class
Class J
Connection
Ferrule
Connection Material
Tin-Plated Copper
Interrupt Rating
200 kA
Mounting
Clip
Size
2.25 x 0.81 in
Size
57.15 x 20.65 mm
Special Features
Non-indicating or solid state SmartSpot visual blown fuse indicator Time-delay for motor starting and transformer inrush Self Certified 700VAC, 15-600A range, 100kA IR 300kA interrupting rating - self-certified, UL witnessed tests Extremely current-limiting for low peak let-thru current Most current-limiting UL class fuse Recommended for Arc Flash energy reduction 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 brand 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 indicator/switch mount for AJT70 to 600 open fuse indication
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
Standard
AJT (1-600): UL listed to standard 248-8 File E2137 DC listed to UL standard 248 CSA certified to standard C22.2 No. 248.8 IEC 60269-2-1 AJT (70-600) EI: UL listed DC tested to UL standard 248 Self Certified 700VAC, 15-600A range
Sub Brand
Amp-Trap® 2000, SmartSpot®
Type
Class J
Type
North American Power Fuses
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
2.25 IN x 0.813 IN x 0.813 IN
Package Dimensions (L x W x H)
5.715 cm x 20.6502 mm x 20.6502 mm
Package Weight (Imperial)
0.200 L
Package Weight (Metric)
0.091 kg
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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.

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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.