Eaton LPS-RK-25SP Fuse - Class RK1, 600 Vac and 300 Vdc
Part Number: LPS-RK-25SP
Quick Summary
Eaton LPS-RK-25SP fuse provides time-delay, current-limiting protection for electrical panels. This helps prevent nuisance trips during startup and reduces downtime on demanding automation lines. It carries CE marking, is built to Class RK1 protection standards, and uses dual-element construction for improved reliability. Designed for easy installation across AC and DC systems, it supports efficient control panel modernization and routine maintenance. The 25 A rating, 5 inch length, and ferrule-end connections enable drop-in compatibility with common Bussmann footprints, minimizing retrofit costs. With a high interrupt rating of up to 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, it delivers robust protection while supporting system safety and regulatory compliance.
Product Information
Extended Description
LPS-RK-25SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 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-25SP
UPC
051712548359
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
25 A
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
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Bussmann series Fuseology
Bussmann series Low-Peak 600 V LPS Class RK1 time-delay fuses, up to 600 A data sheet no. 1001
Feature: Time-delay dual-element design. Business Impact: Allows brief inrush events without nuisance tripping, improving line uptime and motor-start reliability. Application: motor starters, drives, and control circuits in industrial panels. Feature: Current-limiting action. Business Impact: confines fault currents to protect conductors and upstream devices, reducing damage and repair costs. Application: power distribution feeders and branch circuits in automation cabinets. Feature: Rated for 25 A with 600 Vac / 300 Vdc capability. Business Impact: supports true AC/DC mixed-system deployments and safer, consolidated protection strategy. Application: machine tools, packaging lines, and control cabinets in factories. Feature: High interrupt ratings (300 kAIC at 600 Vac / 100 kAIC at 300 Vdc). Business Impact: enables robust short-circuit tolerance and better fault-coordination with upstream protections. Application: high-load equipment clusters and service feeds in industrial plants. Feature: Ferrule-end connections, 5 in length, 0.81 in square footprint, standard packaging. Business Impact: simplifies installation, improves contact reliability, and facilitates straightforward replacements. Application: retrofit into existing Bussmann series fuse blocks and new installations alike. Feature: Class RK1 compliance and CE marking. Business Impact: supports regulatory approvals and standardized protection performance across regional deployments. Application: European and global manufacturing sites with strict safety requirements.
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FAQs
Yes. The LPS-RK-25SP uses ferrule-end connections (Ferrule end x ferrule end) and a 5 inch length, matching common Bussmann series footprints. Use appropriately rated ferrules with compatible wire sizes and ensure clean, secure terminations to minimize contact resistance and heat buildup.
The time-delay feature tolerates brief inrush without tripping, while the dual-element construction delivers reliable current limiting during faults. This combination improves startup reliability and reduces nuisance trips in motor starters and drives, supporting higher line uptime in automation lines.
Yes. The fuse is rated for 600 Vac and 300 Vdc, enabling use in mixed AC/DC control panels. Its robust ratings help ensure coordinated protection across diverse equipment without needing separate devices.
The LPS-RK-25SP carries CE marking for European installations and is designed as a Class RK1 protection device. This, combined with standard RoHS considerations, supports global deployments and regulatory alignment for safety-critical electrical protection.
The fuse’s high interrupt rating reduces fault-related damage and downtime, while its standard packaging (10 pieces per box) and straightforward ferrule-term connections minimize replacement time and labor. Durable construction and compatibility with Bussmann series blocks lower lifecycle costs and simplify maintenance planning.