Eaton JJN-1200 Fuse - Class T, 200 kAIC at 300 Vac
Part Number: JJN-1200
Quick Summary
The Eaton JJN-1200 fuse provides current-limiting protection for VFD-driven drives in industrial motor control panels. Engineers often contend with nuisance trips and downtime when selecting fuses for high-inrush, variable-speed applications. It is CE-marked and RoHS compliant, and it uses a Class T fast-acting design for predictable clearing. With a 1200 A rating and high interrupt capability, it supports reliable protection while simplifying procurement in demanding environments. Powered by the Bussmann series, it aligns with standard panel interfaces for straightforward installation and maintenance, and the bolted blade end connections support secure, low-resistance wiring in compact switchgear.
Product Information
Extended Description
JJN-1200 Eaton: Eaton Bussmann series JJN fuse, Current-limiting, VFD line protection, 1200 A, Class T, Non-indicating, Bolted blade end x bolted blade end, 100 kAIC at 170 Vdc, 200 kAIC at 300 V, Standard, 1, 300 V, 170 Vdc
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-1200
UPC
051712627238
Product Length/Depth
4 in
Product Height
2 in
Product Width
2 in
Product Weight
1.45 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
1200 A
Interrupt rating
200 kAIC at 300 Vac 100 kAIC at 170 Vdc
Voltage rating
300 Vac, 170 Vdc
Packaging type
Standard
Class
Class T
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Quantity
1
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Feature: High current rating of 1200 A — Business Impact: Protects large motors and drives from overload while tolerating inrush without nuisance tripping, reducing unplanned downtime in heavy-duty conveyors and pump systems. Application: VFD line protection in industrial panels. Feature: Interrupt rating of 200 kAIC at 300 Vac and 100 kAIC at 170 Vdc — Business Impact: Provides robust fault current clearing to safeguard downstream equipment and wiring, enabling safer, more reliable system operation. Application: High-current DC and AC fault protection in mixed-voltage drives. Feature: Class T fast-acting design — Business Impact: Predictable clearing times improve coordination with upstream devices and minimize energy let-through during faults. Application: Critical motor control circuits where fast fault response is required. Feature: Bolted blade end connections — Business Impact: Ensures secure, low-resistance terminations and vibration resistance in demanding environments. Application: Field installations in panel boards and switchgear with standard Bussmann holders. Feature: Compact 4 in x 2 in footprint with a 1.45 lb weight — Business Impact: Facilitates higher panel density and easier handling during maintenance, reducing installation time. Application: Space-constrained protection in automated lines. Feature: CE Marked and RoHS compliant — Business Impact: Meets regulatory and environmental requirements, simplifying compliance reporting for European projects. Application: Global deployments where standards enforcement is essential. Feature: Standard packaging and one-unit quantity — Business Impact: Streamlines procurement, inventory planning, and replacement workflows. Application: Routine stocking for serviceable spare parts in control rooms and field service. Insight: As a member of the Bussmann series, the JJN-1200 supports compatibility with a broad ecosystem of fuses, datasheets, and catalogs, reducing engineering guesswork and accelerating project timelines in automation projects.
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FAQs
The JJN-1200 fuse uses bolted blade end connections designed for quick, secure field installation in standard Bussmann fuse holders and panel bus bars. With a 4 in length and 2 in width, it fits common 1–2 in cutouts and indexes easily for line protection circuits. Its 1.45 lb weight helps with weight budgeting in compact switchgear.
Key electrical ratings include 1200 A amperage, 300 Vac voltage with a 170 Vdc rating, and high interrupt capability—200 kAIC at 300 Vac and 100 kAIC at 170 Vdc. The device is a Class T current-limiting fuse with non-indicating operation, suitable for continuous service in motor drives and VFD protection schemes.
Yes, the JJN-1200 is well suited for VFD line protection in motor control panels. Its current-limiting design minimizes fault energy, reducing damage to drives and wiring during faults, while its high interrupt ratings ensure fast clearing at the specified voltage. The Class T family delivers predictable clearing times, aiding panel designers in meeting short-circuit requirements.
Certifications and compliance include CE Marking and RoHS compliance, aligning with European regulatory requirements and environmental standards. It carries the Bussmann Class T designation and official documentation. While there is no UL listing indicated in the data provided, the CE/RoHS compliance supports safe integration in compliant switchgear and control panels.
The JJN-1200 offers reliable current-limiting protection for high-current drives, reducing nuisance trips and downtime. Its robust interrupt ratings and secure bolted connections lower maintenance costs, while compatibility with Eaton Bussmann catalogs and datasheets streamlines procurement and stocking. The result is improved equipment uptime and predictable protection in mixed AC/DC, automated environments.