Eaton JJN-40L Fuse - Class T, 40 A, RoHS Compliant
Part Number: JJN-40L
Quick Summary
The Eaton JJN-40L fuse is a current-limiting, fast-acting protection device designed for electrical distribution in large facilities. For engineers facing crowded panel layouts and demanding protection for VFD lines, reliability and predictable fault clearing matter most. RoHS compliant and part of the Bussmann Class T family, it provides predictable interruption in a compact bolt-mount form. By combining high current rating with fast-acting protection, it supports safe, scalable multi-family metering, energy management, and facility protection initiatives.
Product Information
Extended Description
JJN-40L Eaton: Eaton Bussmann series JJN fuse, Current-limiting very fast acting fuse, Large apartment complexes, Multi-family meter stacks, VFD line protection, 40 A, Class T, Non-indicating, Bolt, Standard
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-40L
UPC
051712664370
Product Length/Depth
0.88 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.029 lb
Warranty
Not Applicable
Compliances
Not Applicable RoHS Compliant
Packaging type
Standard
Class
Class T
Fuse indicator
Non-indicating
Mounting method
Bolt
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - JJN-40L
Feature → Business Impact → Application: The JJN-40L's current-limiting, fast-acting design minimizes fault energy, which reduces equipment damage and downtime in critical drives and bus junctions. This translates to higher uptime for apartment complexes, multi-family meter stacks, and commercial fleets using VFDs. Application: VFD line protection in distributed electrical systems; improved service reliability and reduced repair costs. Feature → Business Impact → Application: A 40 A rating with Class T classification ensures selective coordination and predictable interruption, enabling safer panel operation and easier maintenance. Application: Large facility electrical protection, panel retrofit projects, and new construction with stringent protection specs. Feature → Business Impact → Application: Bolt mounting and non-indicating indicators provide a rugged, easy-to-service solution with minimal tamper and maintenance needs. Application: Factory floor panels, utility meter stacks, and retrofit installations where space is at a premium. Feature → Business Impact → Application: RoHS compliance supports regulatory alignment and supplier continuity, simplifying procurement across regulated projects. Application: Corporate energy programs, healthcare facilities, and municipal buildings seeking sustainable protection components. Feature → Business Impact → Application: Compact packaging (0.88 in x 0.56 in x 0.56 in) and light weight enable easy integration into crowded switchboards and metering assemblies. Application: Replacement in retrofit projects and new builds with limited panel real estate.
Get a Quick Quote for a Eaton JJN-40L
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton JJN-40L?
Enquire Now
FAQs
The JJN-40L is optimized for protection in large electrical distributions, including multi-family meter stacks and VFD-driven lines. Its 40 A rating combined with current-limiting, fast-acting technology minimizes fault energy and downstream damage, helping facility managers reduce downtime and maintenance costs while maintaining safe, reliable power delivery in crowded panel environments.
Yes, the JJN-40L is RoHS compliant per the Bussmann specification data. This means the fuse meets restricted substance requirements, simplifying procurement for regulated projects and ensuring compatibility with standard compliance programs across electrical installations in commercial and residential buildings.
The JJN-40L uses a bolt mounting method for a robust connection. Its physical footprint is 0.88 inches in length, with a width and height of 0.56 inches each, and it weighs about 0.029 pounds. This compact form factor fits into tight panel spaces and dense meter stacks commonly found in large facilities.
Key specs include a 40 A current rating, current-limiting and very fast-acting characteristics, Class T designation, and non-indicating fuse indicators. The combination supports selective coordination, fast fault interruption, and reliable VFD line protection, making it suitable for large complexes and high-load metering installations.
By reducing fault energy and protecting critical equipment, the JJN-40L lowers repair and downtime costs and extends component life. Its bolt-mount reliability, compact size, and RoHS compliance streamline installation and ongoing maintenance in apartment complexes, multi-family metering, and energy-management projects, delivering measurable uptime improvements and long-term operating savings.