Eaton JJN-30L Fuse - Class T Current-Limiting Fuse
Part Number: JJN-30L
Quick Summary
The JJN-30L fuse is a current-limiting protector for VFD lines in large multi-family installations. Specifying the right fuse helps prevent nuisance trips and downtime when meters and drives cluster in shared spaces. This Class T, non-indicating, bolt-mount device is designed for compact protection in commercial panels; certification data isn't listed in the provided dataset. Its 0.88 in length and 0.41 in width-height form factor enables dense layouts while preserving serviceability. With a 30 A rating and current-limiting action, it protects VFD feeds, large apartment complexes, and multi-family meter stacks without compromising fault-clearing speed. In practice, engineers rely on Bussmann series protection to streamline procurement, support uptime, and simplify future upgrades in high-density installations.
Product Information
Extended Description
JJN-30L Eaton: Eaton Bussmann series JJN fuse, Current-limiting, Large apartment complexes, Multi-family meter stacks, VFD line protection, 30 A, Class T, Non-indicating, Bolt, Standard
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-30L
UPC
051712557184
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-30L
Feature: Current-limiting protection limits fault current to protect downstream equipment. Business Impact: Reduces energy during faults, minimizes arc damage, and shortens downtime. Application: Ideal for VFD lines and feeder circuits in commercial panels to safeguard motors and drives. Feature: Class T fuse design with non-indicating operation. Business Impact: Reduces nuisance indicator complexity and simplifies labeling in dense electrical rooms. Application: Bolt-on installation in standard fuse holders for fast commissioning in multi-family sites. Feature: Bolt mounting compatibility. Business Impact: Provides secure, vibration-tolerant installation with minimal hardware while enabling quick replacements. Application: Suitable for panelboards and meter stacks in high-occupancy buildings. Feature: Compact physical footprint. Business Impact: Saves panel space and enables higher packing density in large apartment complexes. Application: Panels with limited depth benefit from the 0.88 in length and 0.41 in width profile. Feature: 30 A current rating for robust protection. Business Impact: Supports reliable protection for moderate to heavy drive loads, reducing risk of downstream faults. Application: VFD line protection and feeder protection in multi-tenant electrical systems. Industry-context Insight: The JJN-30L is part of the Bussmann series protection family, enabling consistent procurement across projects and simplifying lifecycle maintenance for high-density residential and commercial installations.
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FAQs
The JJN-30L is designed for bolt mounting in standard Bussmann-style fuse holders. Its compact 0.88 in length and 0.41 in width help maximize panel space, while the bolt-on method ensures secure, vibration-resistant installation in commercial panels and dense multi-family electric distributions.
The JJN-30L is a 30 A current-limiting Class T fuse with non-indicating operation. It has a compact footprint (0.88 in x 0.41 in x 0.41 in) and provides fast fault interruption for VFD lines and feeders, helping protect downstream equipment in multi-tenant installations.
Yes. The JJN-30L is specifically described for VFD line protection and large apartment complexes, making it well-suited for multi-family meter stacks where reliable protection and quick replacement are important for uptime in high-density buildings.
As a non-indicating fuse, the JJN-30L requires regular electrical testing and upstream protection checks rather than visual trip indication. When a fault occurs, replace with an identical JJN-30L to maintain consistent protection characteristics and panel compatibility.
Refer to Eaton Bussmann catalogs and datasheets for the JJN-30L, including the Bussmann series complete catalog no. 1007 and the Eaton Specification Sheet for JJN-30L. Additional media includes the Fuseology video which explains protection concepts and installation considerations.