
Mersen NLJ30 Class J NEUTRAL LINK 600V 30A
Alternate Item Number: 782001712921
UPC: 782001712921
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Rated for 600V and 30A for industrial applications.
- Features high-conductivity tin-plated copper clips.
- Designed exclusively for copper wiring connections.
- Meets UL4248 and CSA standards for reliability.
- Provides critical neutral grounding in Class J fuse systems.
Specifications
Amperage Rating | 30 A |
Application | Used in place of a fuse |
Brand Name | Ferraz Shawmut |
Connection Type | Copper wiring only |
Current Rating | 30 A |
Material | Tin-Plated Copper |
Nema Rating | Class J |
Series | Class J |
Type | Neutral Link |
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) | 0.354 L |
Package Weight (Metric) | 0.161 kg |
Frequently Asked Questions
What types of circuits can the AJT fuses be used for?
AJT fuses are suitable for motor circuits, mains, feeders, branch circuits, lighting, heating, general loads, transformers, control panels, circuit breaker back-up, bus duct, and load centers.
What is the voltage and amperage rating for AJT fuses?
AJT fuses are rated for 600VAC or less and 500VDC or less, with amperage ratings from 1 to 600A.
What is the interrupting rating (IR) for AJT fuses?
The interrupting rating is 200kA I.R. AC and 100kA I.R. DC. It is self-certified for 600VAC at 300kA I.R., with UL witnessed tests.
What is the SmartSpot feature on AJT fuses?
The SmartSpot feature provides a visual open fuse indicator, allowing for easy identification of a blown fuse.
What are the benefits of the time-delay characteristic of AJT fuses?
The time-delay characteristic is ideal for handling typical motor and transformer inrush currents, while also providing superior current-limiting ability.
Are there any specific approvals for AJT fuses?
Yes, AJT fuses are UL listed to standard 248-8 (File E2137), DC listed to UL standard 248, CSA certified to standard C22.2 No. 248.8, and meet IEC 269-2-1.
How does the AJT fuse contribute to safety and efficiency?
AJT fuses are recommended for Arc Flash energy reduction and offer easy 2-to-1 selectivity to prevent nuisance shutdowns.
What makes the physical design of AJT fuses advantageous?
AJT fuses have a small footprint requiring less mounting space and unique Class J dimensions to prevent replacement errors.
What materials are used in the construction of AJT fuses?
AJT fuses feature a fiberglass body for dimensional stability and high-grade silica filler for fast arc quenching.
Is the SmartSpot indicator available on all AJT fuse ratings?
No, the SmartSpot visual indicator is not available on AJT fuses rated from 1A to 7A.
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.



