Eaton KLU-4000 Fuse - Class L, 200 kAIC at 600 Vac RoHS
Part Number: KLU-4000
Quick Summary
KLU-4000 fuse by Eaton Bussmann provides fast-acting Class L protection for large electrical feeders in power distribution and motor circuits. Engineers frequently wrestle with overcurrent events, downtime, and nuisance trips that disrupt production and inflate maintenance costs. The device carries CE marking and RoHS compliance to meet global regulatory expectations, while its current-limiting Class L design minimizes fault energy. For procurement teams, this fuse pairs with standard bolted blade end connections for straightforward installation, predictable performance, and long-term cost savings across electrical protection & circuit control applications. This combination supports uptime, compliance, and rapid maintenance in demanding environments and helps reduce spare parts inventory.
Product Information
Extended Description
KLU-4000 Eaton: Eaton Bussmann Series Class L fuse, KLU, fast-acting, current limiting fuse, 4000 A, bladable fuse, interrupting rating of 200 kA, 600 Vac
Product Name
Eaton Bussmann series KLU fuse
Catalog Number
KLU-4000
UPC
051712497046
Product Length/Depth
10.75 in
Product Height
5 in
Product Width
5 in
Product Weight
22.15 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Amperage Rating
4000 A
Interrupt rating
200 kAIC at 600 Vac
Response time
5 sec at 500%
Voltage rating
600 V
Packaging type
Standard
Class
Class L
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Mounting method
Bolt
Quantity
1
Special features
Indicating
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series KLU Class L fuse data sheet No. 1013
Feature: Fast-acting Class L fuse design provides rapid short-circuit interruption. Business Impact: It sharply limits energy let-through, protecting conductors, busbars, and connected equipment while reducing downstream damage and downtime. Application: Ideal for large feeders in switchgear, motor control centers, and power distribution panels found in automotive plants, process facilities, and general manufacturing environments. Feature: 4000 A amperage rating paired with 200 kAIC interrupt at 600 Vac. Business Impact: This combination supports high-load circuits without nuisance trips, enabling reliable production and longer component life. Application: Suitable for heavy-duty motor feeders, welding circuits, and process lines in metalworking, plastics, and food and beverage facilities. Feature: 5 second response time at 500% overload. Business Impact: Reduces fault energy quickly, improving worker safety, reducing arc-flash exposure, and enabling tighter coordination with upstream protection schemes. Application: Critical protection strategy for automated lines, CNC machining centers, robotics cells, and high-rough-service drives. Feature: Bolted blade end connections with bolt mounting. Business Impact: Allows secure, vibration-resistant installation with straightforward commissioning in both retrofits and new builds. Application: Panelboards, switchgear cabinets, outdoor enclosures, and large power distribution assemblies that use standard Bussmann-series components. Feature: RoHS compliant and CE marked. Business Impact: Regulatory alignment simplifies audits, reduces supplier risk, and accelerates cross-border procurement. Application: Global OEM panels, service centers, and industrial control cabinets with consistent regulatory compliance. Feature: Special features include indicating. Business Impact: Improves fault tracing and maintenance planning. Application: Control cabinets and switchgear requiring visible fuse status.
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FAQs
Install the KLU-4000 using its bolted blade end connections with proper torque on bolting to ensure a secure, vibration-resistant fit. Confirm the mounting method is Bolt as specified, align with existing busbar geometry, and verify clean contact surfaces to minimize contact resistance and heating under fault conditions.
The KLU-4000 is rated for 4000 A with an interrupt rating of 200 kAIC at 600 Vac. It carries a 600 V voltage rating and is a Class L, fast-acting current-limiting fuse designed to minimize let-through energy during faults.
Yes. With a high amperage rating, current-limiting design, and robust interrupt capability, the KLU-4000 is well-suited for motor feeders, switchgear, and large power distribution panels in industrial environments, helping reduce downtime and equipment damage while meeting regulatory requirements.
The KLU-4000 is CE marked and RoHS compliant, aligning with global regulatory expectations and simplifying cross-border procurement for OEMs and service centers alike.
By limiting fault energy, reducing downtime from nuisance trips, and enabling tighter protection coordination, the KLU-4000 helps extend equipment life, lower maintenance costs, and improve plant uptime, delivering a favorable ROI in manufacturing and processing facilities.