Eaton JJN-250N Fuse - UL Listed Class T Fast-Acting
Part Number: JJN-250N
Quick Summary
The Eaton JJN-250N fuse is a current-limiting, fast-acting protective device designed for industrial power circuits. Engineers face the challenge of delivering rapid fault interruption without triggering unnecessary outages in high-energy panels. This Class T fuse carries UL Listed, CSA Certified, and CE Marked approvals with RoHS compliance, supporting global safety and sustainability requirements. Designed for bolted blade end connections and compact installation, it enables reliable protection in motor drives, switchgear, and power distribution assemblies. By combining a precise interruption rating with a straightforward mounting footprint, it helps reduce spare parts, downtime, and total cost of ownership across critical facilities.
Product Information
Extended Description
JJN-250N Eaton: Eaton Bussmann series JJN fuse, Current-limiting, Very fast-acting fuse, 250A, 300 Vac, 160 Vdc, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Class T, Bolted blade end X bolted blade end, 1 unit, 1 inch dia, Nickel plated
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-250N
UPC
051712708784
Product Length/Depth
1 in
Product Height
2.75 in
Product Width
1 in
Product Weight
0.08 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Certifications
UL Listed CSA Certified
Amperage Rating
250 A
Interrupt rating
200 kAIC at 300 Vac 20 kAIC at 160 Vdc
Voltage rating
300 Vac, 160 Vdc
Packaging type
Standard
Class
Class T
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Quantity
1
JJN-250N~TRON FAST ACTING FUSE CLASS T
JJN-250N~TRON FAST ACTING FUSE CLASS T
Bussmann series Fuseology
Eaton Specification Sheet - JJN-250N
High-current rating and versatile voltage specifications are core features: the JJN-250N is rated for 250 A, 300 Vac and 160 Vdc, delivering dependable current-limiting during faults. This capability protects downstream components and reduces arc flash risk, while enabling safe operation in heavy-duty motor drives and power distribution. The Class T, very fast-acting design minimizes damage in short-circuit events, shortening downtime and lowering repair costs in automated lines and packaging facilities. Bolted blade end connections provide secure, repeatable mounting within standard Bussmann-series enclosures, simplifying retrofits and new builds. The compact footprint—1 in depth, 1 in width, and 2.75 in height—facilitates installation in dense control panels and limited spaces. Compliance with RoHS, CE, UL, and CSA standards ensures regulatory alignment for global deployments, while straightforward replacement supports maintenance planning and inventory control.
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FAQs
Mounting the JJN-250N requires bolted blade end connections compatible with Bussmann-series assemblies. Ensure clean, tight blade-term connections, align the fuse with the panel or enclosure’s fuse holder, and follow Eaton’s installation guidance for torque and clearance. The device’s Class T design and non-indicating fuse indicator simplify replacement in controlled environments, improving maintenance efficiency.
The JJN-250N provides current-limiting protection with an interrupt rating of up to 200 kAIC at 300 Vac and 20 kAIC at 160 Vdc. This rapid interruption minimizes arcing and downstream damage during short circuits, reducing downtime and extending the life of downstream transformers, relays, and motor drives in high-energy applications.
Yes. With a 250 A rating, 300 Vac / 160 Vdc limits, and Class T fast-acting performance, the JJN-250N is well-suited for motor control centers, switchgear, and distribution panels. Its bolted blade end connections and compact form factor simplify integration into existing Bussmann-series workflows, making it a reliable choice for new builds and retrofits alike.
The JJN-250N is UL Listed, CSA Certified, and CE Marked, with RoHS compliance. These certifications verify safety performance, reliability, and regulatory adherence across North America and Europe, supporting procurement decisions in regulated industries and helping to streamline supplier qualification and qualification audits.
Using the JJN-250N can reduce total cost of ownership by lowering downtime due to fast fault interruption and minimizing downstream equipment damage. Its 1 in by 2.75 in footprint eases installation, while standardization with Bussmann-series components simplifies spares, replacements, and service planning for plants with extensive panel builds.