Eaton LPS-RK-6-1/4SP Fuse - Class RK1, CE Marked
Part Number: LPS-RK-6-1/4SP
Quick Summary
Eaton LPS-RK-6-1/4SP fuse delivers reliable overcurrent protection for industrial control panels and motor circuits. Engineers often struggle to select a time-delay, dual-element fuse that minimizes nuisance trips while maintaining safety and regulatory compliance. This LPS-RK1 device is CE marked with Class RK1 designation and high interrupt ratings (300 kAIC at 600 Vac, 100 kAIC at 300 Vdc), ensuring robust protection across diverse loads. With ferrule-end connections and a compact 5-inch length, it fits neatly in crowded control panels and streamlines field replacements. The combination of current-limiting performance and standardized packaging supports efficient procurement, reduced downtime, and improved compliance in commercial and industrial environments.
Product Information
Extended Description
LPS-RK-6-1/4SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 6.25 A, non-indicating fuse, interrupting rating of 300 kA at 600 Vac and 100 kA at 300 Vdc
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-6-1/4SP
UPC
051712548267
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
1.6 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
6.25A
Interrupt rating
100 kAIC at 300 Vdc 300 kAIC at 600 Vac
Response time
10 sec at 500%
Voltage rating
600 Vac, 300 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
Special features
Electrically isolated end cap
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Feature: Time-delay, dual-element design provides inrush tolerance for motors and loads while delivering fast fault interruption. This arrangement reduces nuisance trips during startup and protects contactors, drives, and power supplies without compromising safety. Application: ideal for motor starters, conveyors, and automation panels where switch-on surges are routine and dependable protection is essential. Feature: Current-limiting with high interrupt ratings (300 kAIC at 600 Vac and 100 kAIC at 300 Vdc) safely contains fault energy. Business impact: minimizes arcing and collateral damage to wiring, bus bars, and upstream devices, lowering maintenance costs and downtime. Application: suitable for main feeders, distribution blocks, and high-energy panel boards in industrial facilities. Feature: Class RK1 compatibility and CE Marked compliance provide regulatory alignment and cross-compatibility with Bussmann RK1 time-delay fuses. Impact: simplifies sourcing, reduces part-number proliferation, and supports consistent protection across legacy equipment. Application: control cabinets, OEM assemblies, and service catalogs that rely on standardized RK1 devices for reliable protection. Feature: Compact 5-inch length with a 0.81 inch square footprint saves panel space and supports dense installations. Business impact: enables higher channel density, easier wiring routing, and lower enclosure costs. Application: distributed control cabinets and machine control panels in manufacturing environments. Feature: Electrically isolated end caps improve safety during maintenance and simplify field replacement. Impact: reduces risk of arcing or accidental contact when swapping fuses in crowded panels. Application: retrofit projects and service work in compact electrical environments. Feature: Ferrule-end x ferrule-end connection and standard packaging of 10 per pack streamline installation and stocking. Impact: enhances plug-and-play compatibility with existing harnesses and reduces warehouse complexity. Application: panel builders, integrators, and service teams deploying RK1 fuses across multiple sites.
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FAQs
Power down the panel, verify compatibility with ferrule-end RK1 holders, and insert the LPS-RK-6-1/4SP with proper end-cap orientation. Ensure secure seating and correct route of the ferrules to prevent strain. Follow standard Eaton Bussmann guidelines for safe replacement and avoid introducing live circuits during handling.
Yes. The LPS-RK-6-1/4SP uses ferrule-end connections designed for RK1 class protection schemes, ensuring reliable fit and predictable performance when deployed alongside other RK1 devices in same panel or harness ecosystem.
Ideal for industrial control panels, motor drives, and power-distribution sections where start-up surges are common and robust short-circuit protection is required. The 6.25 A rating and time-delay characteristics support equipment like conveyors, fans, and programmable logic controllers.
The LPS-RK-6-1/4SP is CE Marked and conforms to Class RK1 protection requirements. Its high interrupt ratings and non-indicating design meet typical European regulatory expectations for industrial electrical protection.
By reducing nuisance trips and enabling safe, rapid replacement in dense panels, the fuse minimizes downtime, extends motor life through proper protection, and simplifies sourcing with standardized RK1 packaging, delivering measurable productivity and maintenance cost savings.