Eaton KLM-4 Fuse - 50kAIC @600VDC; 100kA @600VAC
Part Number: KLM-4
Quick Summary
The Eaton KLM-4 fuse provides fast-acting protection for low-voltage circuits in industrial equipment. In the field, downtime and nuisance fuse blows erode productivity; this device is designed to respond quickly to faults while preserving critical loads. It carries CE marking and RoHS compliance, aligning with European safety and environmental standards, and supports both 600 VDC and 600 VAC service ratings for mixed-control panels. With ferrule-end connections and a robust melamine tube, it offers reliable, field-installable protection in a compact form. These features translate to easier procurement, reduced stock diversity, and sustained machine availability in manufacturing environments.
Product Information
Extended Description
KLM-4 Eaton: Eaton Bussmann series KLM fuse, 4 A, Non-indicating, Ferrule end x ferrule end, 50 kAIC at 600 Vdc, 100 kAIC at 600 V, Nickel-plated bronze endcap, Melamine tube, 600 V, 600 Vdc
Product Name
Eaton Bussmann series KLM fuse
Catalog Number
KLM-4
UPC
051712695114
EAN
5027590445412
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.18 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
4 A
Interrupt rating
50 kAIC at 600 Vdc 100 kAIC at 600 Vac
Voltage rating
600 Vac, 600 Vdc
Material
Melamine tube Nickel-plated bronze endcap
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
Indicating
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - KLM-4
KLM-4~LIMITRON FAST ACTING FUSE
Datasheet - FNQ-30
The KLM-4 provides high fault-interruption capability with a 50 kAIC rating at 600 Vdc and 100 kAIC at 600 Vac, enabling quick isolation of faults and protecting downstream components from damage. This translates to reduced downtime, lower repair costs, and improved overall equipment reliability in automation and process control applications. The 4 A amperage rating delivers precise protection for small to medium loads, helping engineers coordinate with upstream devices to achieve selective tripping and minimize unnecessary outages. Ferrule-end x ferrule-end connections simplify installation into standard fuse blocks and panel interfaces, enabling fast replacements and consistent electrical contact in busy control rooms. The melamine insulation tube and nickel-plated bronze end caps provide durable performance in harsh industrial environments, helping extend service life and reducing maintenance frequency. The 600 V rating for both AC and DC supports mixed-voltage control panels, lowering part variety and streamlining procurement. CE Marking and RoHS compliance ensure regulatory alignment for European projects and sustainable manufacturing practices, reducing compliance risk in global deployments. The compact form factor also aids in dense panel layouts, improving access and airflow to minimize thermal buildup and improve reliability. Industry teams value these attributes for easier spares management, faster engineering sign-off, and improved uptime in automated production lines.
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FAQs
The KLM-4 uses ferrule-end connections designed for standard fuse holders and busbar interfaces. To install, verify correct ferrule alignment, secure the ferrules with the recommended torque, and ensure there is proper clearance for heat dissipation. The process is straightforward, allowing quick field replacement in crowded control panels.
The KLM-4 is rated at 4 A with an interrupt rating of 50 kAIC at 600 Vdc and 100 kAIC at 600 Vac, and a voltage rating of 600 Vac / 600 Vdc. These specs define the maximum fault current the fuse can safely interrupt and the maximum system voltage it can protect, enabling proper coordination with upstream protection devices.
Yes. With a 600 Vdc rating and a 4 A current rating, the KLM-4 is suitable for DC control circuits commonly found in automation and drive applications. Ensure the operating conditions stay within these limits and consider coordination with rectifier stages or PWM drives to minimize nuisance tripping.
KLM-4 carries CE marking and RoHS compliance, which support regulatory alignment for European projects and environmental sustainability. While the datasheet excerpt focuses on these certifications, always verify local requirements such as UL or CSA in your region to ensure full compliance for specific installations.
The high interrupt ratings reduce nuisance blows during surges, minimizing downtime and maintenance costs. A standardized 4 A fuse simplifies spare parts stocking across fleets, lowering inventory costs, while the robust construction extends service life in harsh environments. Together, these factors contribute to improved uptime and lower total cost of ownership.