Eaton JJN-20L Fuse - Class T Current-Limiting
Part Number: JJN-20L
Quick Summary
Eaton JJN-20L fuse provides current-limiting protection for commercial feeders and multi-family meter stacks. Engineers often contend with nuisance trips, cramped control cabinets, and the challenge of protecting VFD-driven loads without sacrificing space. The data lists Class T, bolt mounting, and non-indicating features, but warranty and compliance details are not specified—confirm certifications with Eaton for your project. This fuse combines a compact footprint with robust protection, supporting reliable coordination with Bussmann-series offerings. For procurement, it suits high-density meter stacks and commercial feeders while delivering predictable performance in demanding environments.
Product Information
Extended Description
JJN-20L Eaton: Eaton Bussmann series JJN fuse, Current-limiting, Large apartment complexes, Multi-family meter stacks, VFD line protection, 20 A, Class T, Non-indicating, Bolt, Standard
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-20L
UPC
051712367264
Product Length/Depth
0.88 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.25 lb
Warranty
Not Applicable
Compliances
Not Applicable
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-20L
Feature current-limiting design → Business Impact reduced fault energy and enhanced conductor protection; Application ideal for VFD line protection in large facilities and multi-family installations. Feature Class T fuse → Business Impact broad protection tolerance during short surges; Application suitable for equipment with fluctuating loads in commercial buildings. Feature bolt mounting → Business Impact secure, vibration-resistant installation; Application simplifies retrofit in panel boards and meter stacks. Feature non-indicating design → Business Impact cleaner front panels and easier handling in crowded assemblies; Application helps maintain enclosure aesthetics in utility rooms. Feature compact form factor → Business Impact saves panel space and enables higher circuit density; Application valuable in retrofit projects and new builds with space constraints. Feature standard packaging → Business Impact predictable logistics and field servicing; Application supports straightforward inventory and quick replacements in service environments.
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FAQs
The JJN-20L uses bolt mounting, enabling secure, vibration-resistant installation in panelboards and meter stacks. This method suits both new panel designs and retrofit projects where a stable mechanical interface is essential. When selecting mounting hardware, ensure bolt dimensions match standard bolt-on holders used in commercial electrical protection assemblies.
The JJN-20L is a 20 A current-limiting fuse with Class T characteristics and a non-indicating fuse indicator. It is designed for protecting circuits against overcurrent while limiting fault energy. Its bolt-on mounting simplifies integration with standard bus and holder assemblies in commercial protection schemes and large-meter installations.
Yes. The 20 A Class T current-limiting JJN-20L fuse is well-suited for protecting VFD lines in large apartment complexes and commercial facilities. Its compact form factor and reliable interruption characteristics help minimize voltage dips and ride-through issues, supporting stable drive operation and reduced downtime in electrically intensive environments.
The provided data marks warranty and compliances as Not Applicable. For critical deployments, verify the exact certification scope with Eaton, including any regional safety marks (such as UL or CE where applicable) to ensure alignment with local electrical codes and project requirements before purchase.
You can access the Eaton specification sheet for JJN-20L and related Bussmann-series catalogs from Eaton’s official resources. Look for the Eaton Specification Sheet - JJN-20L and Bussmann series catalogs (no. 1007) to obtain complete technical details, mounting instructions, and installation guidelines for procurement and design validation.