Eaton JJN-50L Fuse - Class T, 50A, RoHS Compliant
Part Number: JJN-50L
Quick Summary
Eaton JJN-50L fuse is a current-limiting, fast-acting protection device for large residential feeders. It helps safeguard downstream equipment while enabling quick fault clearance, reducing downtime and the risk of cascading failures. The challenge for engineers is balancing reliable protection with minimal nuisance trips in multi-family meter stacks and VFD-driven lines. This datasheet notes RoHS compliance and a Class T fuse design, with bolt mounting and a non-indicating indicator to simplify installation in crowded panels. While other certification marks aren’t listed here, the JJN-50L aligns with common electrical protection expectations and integrates smoothly with the Eaton Bussmann series catalog. For project teams, the combination of reliability and installation simplicity translates to lower maintenance costs and faster service restoration.
Product Information
Extended Description
JJN-50L Eaton: Eaton Bussmann series JJN fuse, Current-limiting very fast acting fuse, Large apartment complexes, Multi-family meter stacks, VFD line protection, 50 A, Class T, Non-indicating, Bolt, Standard
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-50L
UPC
051712666589
EAN
5027590118415
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.1 lb
Warranty
Not Applicable
Compliances
Not Applicable RoHS Compliant
Packaging type
Standard
Class
Class T
Fuse indicator
Non-indicating
Mounting method
Bolt
JJN-50L~JJN-50 W/END TERMINALS
JJN-50L~JJN-50 W/END TERMINALS
Bussmann series Fuseology
Eaton Specification Sheet - JJN-50L
50 A current-limiting, very fast-acting design delivers rapid fault clearing, protecting downstream conductors and equipment before faults escalate. By stopping fault current quickly, it reduces arc flash energy, minimizes insulation damage, and helps maintain service continuity in high-load feeders. This makes the JJN-50L well suited for VFD line protection, large apartment complexes, and multi-family meter stacks where selective coordination matters. Class T construction provides robust interrupting performance while maintaining a compact form factor suitable for crowded panels. Bolt mounting ensures a secure, vibration-resistant connection in switchgear and meter canopies, reducing the risk of loose connections that trigger nuisance trips. Together, these features translate to lower field labor costs and longer service intervals during maintenance or component replacements. Non-indicating fuse status simplifies installation and replacement in environments with limited visibility or where indicators aren’t required. The standard packaging and straightforward mounting support fast project timelines, while compatibility with Eaton Bussmann catalogs streamlines procurement for large facilities. The JJN-50L’s tight integration with the Bussmann series inventory reduces stocking diversity and helps maintenance teams keep critical spares on hand. RoHS compliance supports regulatory alignment and sustainability initiatives across building projects. While the data does not list CE, SIL, or IP certifications, the JJN-50L adheres to common electrical protection standards and integrates with the Bussmann line for consistent performance. This combination of compliance and compatibility helps engineers meet safety requirements without sacrificing installation efficiency. In practice, deploying a trusted 50 A current-limiting fuse in a standardized Eaton Bussmann configuration shortens deployment time and improves spare-part planning. The JJN-50L benefits from clear documentation, catalog references, and a familiar installation workflow that reduces risk during commissioning. For projects with long-term protection needs, it delivers predictable maintenance planning and reliable service restoration.
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FAQs
The JJN-50L uses bolt mounting, designed for secure attachment in panel boards and meter canopies. Verify panel hardware and torque specifications per the installation manual, and ensure compatibility with Bussmann series bases and end terminals. This approach minimizes loose connections and enhances vibration resistance in demanding environments.
A 50 A current-limiting fuse rapidly detects and clears faults, reducing peak fault current and arc energy. The Class T designation indicates a standardized interrupting rating suitable for high-demand circuits, delivering selective protection for downstream equipment and motor drives while maintaining system reliability during faults.
Yes. The JJN-50L is well suited for VFD line protection and multi-family meter stacks due to its fast-acting response, bolt-mount robustness, and 50 A rating. Its compatibility with Eaton Bussmann catalogs helps maintain consistent protection across large residential and light commercial installations.
RoHS compliance is noted for the JJN-50L, supporting regulatory and sustainability goals. The data provided does not specify CE, SIL, or IP certifications, so plan to verify your project’s required approvals with your compliance team or Eaton literature for any additional marks.
Utilizing a proven 50 A current-limiting fuse helps reduce downtime by quickly clearing faults and protecting downstream gear. Standardized mounting and seamless Bussmann-series integration simplify stocking and maintenance planning, lowering spare-part costs and speeding commissioning in large facilities.