Eaton JKS-400 Fuse - Class J, 400A, 200kAIC
Part Number: JKS-400
Quick Summary
The Eaton JKS-400 fuse provides fast-acting, current-limiting protection for branch circuits in industrial electrical panels. Unplanned outages from overcurrent can damage equipment and disrupt production; this fuse offers rapid interruption to minimize downtime. It is RoHS compliant and built as a Class J fast-acting device rated for 600 V and 400 A, delivering 200 kAIC interrupt capability to support high-demand applications. The design aligns with the Eaton Bussmann series for easy replacement and predictable performance, helping maintenance teams manage spares and improve overall system reliability.
Product Information
Extended Description
JKS-400 Eaton: Eaton Bussmann Series Class J fuse, JKS, fast-acting, current limiting fuse, 400 A, rejection style fuse, interrupting rating of 200kA at 600Vac
Product Name
Eaton Bussmann series JKS fuse
Catalog Number
JKS-400
UPC
051712634007
Product Length/Depth
7.13 in
Product Height
2 in
Product Width
2 in
Product Weight
1.85 lb
Warranty
Not Applicable
Compliances
RoHS Compliant
Amperage Rating
400 A
Interrupt rating
200 kAIC at 600 Vac
Voltage rating
600 V
Number of elements
1
Packaging type
Standard
Class
Class J
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Quantity
1
Special features
Non-indicating
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series JKS fast-acting Class J fuses, 70-600A technical data sheet no. 1027
Feature → Class J fast-acting fuse design provides rapid current interruption, reducing fault energy and protecting sensitive equipment. Business Impact → Lower maintenance costs and less downtime during fault events. Application → Ideal for industrial control panels and power distribution enclosures in manufacturing facilities. Feature → 400 A amperage rating with a 200 kAIC interrupt rating at 600 Vac delivers robust protection for high-current feeders. Business Impact → Prevents nuisance tripping and upstream damage, enabling safer startup sequences. Application → Suitable for motor drives, welding circuits, and large control circuits. Feature → Bolted blade end x bolted blade end terminations with a single-element construction simplifies field replacement and inventory management. Business Impact → Reduces commissioning time and minimizes stocking variety in maintenance shops. Application → Retrofit in legacy Bussmann systems or new builds using Bussmann series components. Feature → RoHS compliant construction supports environmental and regulatory compliance across regions. Business Impact → Facilitates supplier qualification and sustainability reporting. Application → Widely applicable in electronics manufacturing, automotive equipment, and industrial machinery. Feature → Rejection style design helps prevent improper installation by ensuring correct orientation during panel assembly. Business Impact → Improves installation safety and reduces misfit-related downtime. Application → High-volume OEM panel lines and field service operations benefit from reduced errors.
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FAQs
The JKS-400 uses bolted blade end connections and a single-element design, which simplifies mounting and ensures a secure, vibration-resistant fit in standard Bussmann series fixtures. Plan for 7.13 in length and 2 in width/height, and confirm panel cutouts and clearance for safe insertion. Proper torque on blade connections is advised to maintain reliable fault interruption performance.
The JKS-400 is rated for 400 A with an interrupt rating of 200 kAIC at 600 Vac. It operates at a voltage rating of 600 V and provides fast-acting, current-limiting protection. This combination supports high-current feeders and ensures rapid fault clearance to protect downstream components and reduce damage during faults.
Yes. With a 400 A rating and 200 kAIC interrupt capability at 600 Vac, the JKS-400 is well suited for motor control centers, drive panels, and large control circuits. The bolted blade ends and standard packaging enable straightforward replacement and integration within existing Bussmann-based MCCs and distribution panels.
The JKS-400 is RoHS compliant, aligning with environmental and regulatory expectations in many regions. While RoHS is the primary listed certification in the data, the device is designed within the Eaton Bussmann Class J family to meet industry-standard electrical protection requirements for industrial applications.
Adopting the JKS-400 can reduce downtime from overcurrent events due to its fast-acting, high interrupt rating, protecting upstream equipment and minimizing downstream damage. The standard 7.13 in length and bolted blade ends streamline installation and spares management, lowering maintenance complexity and helping manufacturers achieve predictable TCO and improved line reliability.