Eaton JJN-400 fuse - Class T, 400 A Current-Limiting
Part Number: JJN-400
Quick Summary
The Eaton JJN-400 fuse is a Class T current-limiting device designed to protect motor drives and critical power circuits. Engineers often struggle with nuisance trips and inadequate protection when safeguarding VFD lines and heavy loads; this fuse addresses that by delivering selective, rapid interruption. CE marked and RoHS compliant, it aligns with essential EU safety and environmental standards while maintaining robust protection for electrical systems. As part of Eaton’s Bussmann series, the JJN-400 complements broader electrical protection and circuit control strategies, delivering reliable performance in a compact, installation-friendly package that supports uptime and regulatory compliance.
Product Information
Extended Description
JJN-400 Eaton: Eaton Bussmann series JJN fuse, Current-limiting, VFD line protection, 400 A, Class T, Non-indicating, Bolted blade end x bolted blade end, 20 kAIC at 160 Vdc, 200 kAIC at 300 V, Standard, 1, 300 V, 160 Vdc
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-400
UPC
051712627047
Product Length/Depth
2.75 in
Product Height
1 in
Product Width
1 in
Product Weight
0.25 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
400 A
Interrupt rating
20 kAIC at 160 Vdc 200 kAIC at 300 Vac
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
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
JJN-100~TRON FAST ACTING FUSE CLASS T
The 400 A amperage rating provides strong overload protection for high-current circuits, reducing conductor damage and downtime when faults occur. This current-limiting capability minimizes arc energy while preserving downstream equipment, delivering measurable improvements in system reliability and maintenance costs in motor drives and power distribution applications. The impact is immediate in line protection for VFDs, where controlled interruption limits wear on cables and drives while meeting industry standards for continuity of operations. The device’s interruption rating of 20 kAIC at 160 Vdc and 200 kAIC at 300 Vac means it can absorb high-energy short circuits without nuisance faults, improving system availability and safety in DC bus and AC control circuits. Installation is simplified by bolted blade ends, enabling secure, vibration-resistant mounting in standard panels and fuse blocks. The Class T, non-indicating design reduces panel clutter and provides predictable, proven protection for conventional control circuits. RoHS and CE compliance streamline qualification for EU facilities, accelerating project timelines and reducing regulatory risk. With a compact 2.75 in length, 1 in width, and 0.25 lb weight, it fits neatly into space-constrained enclosures, aiding in efficient panel design and retrofits. Compatibility with Bussmann full-line catalogs ensures easy sourcing and standardized protection across installations, while the standard packaging supports straightforward stocking and turnover in procurement workflows.
Get a Quick Quote for a Eaton JJN-400
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-400?
Enquire Now
FAQs
When installing the JJN-400, ensure bolted blade end connections are clean, aligned, and torqued to the panel manufacturer’s specifications to avoid loose contacts. Use compatible fuse blocks or holders, verify the 2.75 in length and 1 in width fit within available space, and confirm electrical ratings (300 Vac / 160 Vdc) align with the system’s supply. Proper labeling and documentation help with maintenance and regulatory traceability.
The JJN-400 offers a 400 A amperage rating and current-limiting behavior, ideal for protecting VFD inputs and drive lines. It provides 20 kAIC at 160 Vdc and 200 kAIC at 300 Vac, with a voltage rating of 300 Vac and 160 Vdc. The fuse uses bolted blade ends for secure mounting, making it reliable in high-energy, space-constrained drive panels.
Yes. The JJN-400 is CE Marked and RoHS Compliant, which supports regulatory acceptance in EU markets. These certifications indicate conformance with essential environmental and safety requirements, helping speed approvals for equipment that incorporates the fuse within electrical protection systems.
Absolutely. The JJN-400 is designed with bolted blade end x bolted blade end connections, enabling straightforward panel mounting in standard fuse blocks. The 2.75 in length and 1 in width support compact installation in control cabinets, and the non-indicating design simplifies layout while enabling easy field replacement without complex wiring.
Adopting the JJN-400 contributes to lower downtime through fast, reliable interruption during faults, reducing repair costs and unplanned outages in drives and critical loads. Its robust energy-handling (20 kAIC / 160 Vdc, 200 kAIC / 300 Vac) minimizes arc damage, while CE/RoHS compliance streamlines regulatory clearance and procurement from the Bussmann catalog, delivering predictable maintenance budgets and better total cost of ownership.