Eaton LPS-RK-25SPI fuse - 300 kAIC at 600 Vac
Part Number: LPS-RK-25SPI
Quick Summary
The Eaton LPS-RK-25SPI fuse is a time-delay, current-limiting protection device designed for industrial power circuits and control panels. Engineers often face nuisance trips during motor starts or inrush events, which disrupt production and erode uptime. This fuse carries CE marking and belongs to the Class RK1 family, providing predictable coordination with Bussmann RK1 devices and European compliance. With its compact ferrule-end construction and robust interrupt performance, it delivers reliable protection while supporting straightforward replacement in existing RK1 footprints. Leveraging its 25 A rating and 600 Vac capability, this solution helps balance safety, reliability, and cost of ownership for industrial automation environments.
Product Information
Extended Description
LPS-RK-25SPI Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 25 A, indicating fuse, interrupting rating of 300 kA at 600 Vac
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-25SPI
UPC
051712626910
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
300 kAIC at 600 Vac 100 kAIC at 300 Vdc
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 With Indicator
Quantity
10
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
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, current-limiting design. Benefit → Reduces nuisance trips during short-term inrush, safeguarding equipment while maintaining fast fault clearing. Application → Ideal for motor feeders and industrial power circuits where start-up surges are common. Feature → High interrupt rating of 300 kAIC at 600 Vac. Benefit → Enables protection against severe short-circuit faults without damaging upstream equipment. Application → Suitable for service entrances, panel boards, and high-current motor feeders in manufacturing facilities. Feature → Class RK1, ferrule end x ferrule end design. Benefit → Easy, reliable replacement in standard RK1 holders with consistent contact reliability. Application → Used in replacement programs for legacy Bussmann RK1 assemblies. Feature → Fuse indicator option (With Indicator). Benefit → Quick visual status checks reduce maintenance time and improve uptime. Application → Effective in panels where rapid fault identification is needed. Feature → CE Marked and standard dimensions (5 in length, 0.81 in width, 0.81 in height). Benefit → Streamlined procurement and compatibility with existing enclosures and space constraints. Application → Widely deployed in control cabinets and distribution panels across industrial sectors.
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FAQs
To install the LPS-RK-25SPI, ensure you are using a compatible RK1 fuse holder with ferrule connections. Align the ferrule ends with the holder contacts, insert until firmly seated, and verify the fuse indicator (if equipped) shows status. Replace only with the same model to maintain the dual-element design and 300 kAIC rating.
The LPS-RK-25SPI combines time-delay operation with current-limiting capability, allowing normal motor inrush without nuisance tripping while still protecting against short circuits. Its 25 A rating and 600 Vac capability fit common MCC feeder circuits, and its RK1 compatibility ensures straightforward retrofits and panel upgrades.
This fuse provides 25 A at 600 Vac with an interrupt rating of 300 kAIC at 600 Vac (and 100 kAIC at 300 Vdc). The 10-second response time at 500% overload helps tolerate inrush while delivering rapid protection during faults, supporting safer, more reliable electrical systems.
Yes, the fuse is CE marked for European market compliance. RoHS information can be verified through Eaton’s RoHS search resources; availability of RoHS data is provided via Eaton’s RoHS tools, ensuring traceability for compliance documentation.
The fuse is 5 inches long with a width and height of 0.81 inches and a weight around 1.6 pounds. It offers a variant with an indicator for status visibility, facilitating quick field checks during maintenance and reducing panel downtime.