Eaton JJN-25 Fuse - Class T Current-Limiting for VFD Lines
Part Number: JJN-25
Quick Summary
The Eaton Bussmann JJN-25 fuse is a current-limiting device for VFD protection in industrial controls. Engineers often encounter nuisance trips and downtime when selecting protection for motor drives. This fuse meets CE marking and RoHS compliance, supporting European installations and material regulations. With a compact ferrule-end design and Class T performance, it delivers reliable protection while simplifying inventory and replacement. Customers benefit from high interrupt ratings and clear compatibility with standard control panels, enabling faster commissioning. The 25 A rating, 300 Vac and 160 Vdc capability, and 0.88 inch length suit compact drives while maintaining robust safety margins. In fast-paced automation environments, that means fewer parts, faster service, and consistent protection across machines.
Product Information
Extended Description
JJN-25 Eaton: Eaton Bussmann series JJN fuse, Current-limiting, VFD line protection, 25 A, Class T, Non-indicating, Ferrule end x ferrule end, 200 kAIC at 300 V, 20 kAIC at 160 Vdc, Standard, 10, 300 V, 160 Vdc
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-25
UPC
051712627252
Product Length/Depth
0.88 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.1 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
25 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
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
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Current-limiting action of the JJN-25 quickly restricts fault current, protecting cables, contacts, and motor windings from catastrophic damage. In practice, this reduces costly repairs, minimizes unplanned downtime, and lowers maintenance labor over the life of the drive system. The fuse is designed for VFD line protection in industrial controls, including conveyors, pumps, fans, and material-handling equipment, where fast fault isolation can prevent wider system faults and production losses. High interrupt ratings—200 kAIC at 300 Vac and 20 kAIC at 160 Vdc—ensure fast opening under fault conditions, safeguarding feeders, power supplies, and downstream circuitry. This performance supports precise coordination with other protection devices and reduces nuisance trips caused by motor startup inrush. For engineers, the JJN-25 delivers reliable protection for demanding drive applications while maintaining safe arc-energy levels in panel enclosures. Ferrule-end terminations provide robust, repeatable connections in compact panels, while the standard packaging of ten pieces per pack simplifies stocking and replacement cycles. The non-indicating design minimizes panel clutter and eliminates false readings during inspections, while enabling clean integration with external protection relays that monitor status indicators at the system level. The 0.88 inch length and 0.41 inch width/height form factor help fit restricted control cabinets. CE marking and RoHS compliance support global procurement and regulatory adherence, removing procurement risk for multinational projects. The Class T construction with current-limiting action delivers predictable protection and aligns with industry best practices for motor protection in automation. This fuse is well-suited for standard 300 Vac and 160 Vdc circuits commonly found in modern industrial equipment. From a maintenance and supply perspective, the JJN-25's compact packaging and Ferrule-end connections simplify field replacement and reduce maintenance downtime. Access to Eaton Bussmann catalogs and data sheets, including the Bussmann full line catalog, supports design reviews, BOM planning, and lifecycle decisions. By standardizing on a single family of devices, maintenance teams experience faster stocking and fewer spare-part mismatches.
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FAQs
The JJN-25 is designed for VFD line protection in compact control panels with ferrule-end terminations. It features a standard packaging quantity of 10 devices per pack and a 0.88 inch length, making it suitable for space-constrained enclosures and easy stocking in electrical protection inventories. It supports 25 A circuits at 300 Vac and 160 Vdc, aligning with typical motor-drive applications.
The fuse provides current-limiting action and high interrupt ratings—200 kAIC at 300 Vac and 20 kAIC at 160 Vdc—ensuring fast fault clearing and protection of drive components. Its Class T rating offers predictable discrimination with upstream protections, reducing nuisance trips during motor starts and maintaining drive reliability in conveyors, pumps, and fans.
Replacement is straightforward due to ferrule-end connections and a compact footprint. With non-indicating status, you’ll rely on external protection relays or panel tests to verify operation. Maintain a stock of JJN-25 devices (packaged 10 per lot) to minimize downtime, and use a fuse puller to safely remove and install ferrule-end fuses in tight panel spaces.
The JJN-25 is CE marked and RoHS compliant, supporting European regulatory requirements and restricted substance compliance in modern manufacturing environments. These certifications help streamline approvals for international projects and ensure the product aligns with common industrial procurement standards.
By delivering rapid fault isolation and robust protection, the JJN-25 reduces unplanned downtime and equipment damage, lowering maintenance costs over the life of motor-drive systems. Its compact form factor and standardized packaging simplify stocking, BOM management, and field replacements, delivering measurable improvements in panel reliability and maintenance efficiency.