Eaton LPS-RK-50SP Fuse - Class RK1, Time-Delay
Part Number: LPS-RK-50SP
Quick Summary
The Eaton LPS-RK-50SP fuse provides reliable overcurrent protection for electrical panels and motor circuits. Users often face nuisance trips and poor coordination in mixed-voltage systems, making a robust time-delay option essential. This fuse is CE marked and conforms to Class RK1 standards for time-delay, dual-element, current-limiting protection. With ferrule-end connections, a compact 5.5 inch length and a 600 Vac rating, it fits standard Eaton Bussmann wiring schemes while delivering predictable performance. Choosing LPS-RK-50SP can improve system reliability, reduce maintenance costs, and ensure compliance in demanding industrial environments—especially where motor loads and control feeders demand coordination.
Product Information
Extended Description
LPS-RK-50SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 50 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-50SP
UPC
051712548403
Product Length/Depth
5.5 in
Product Height
1.06 in
Product Width
1.06 in
Product Weight
2.6 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
50 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
Special features
Electrically isolated end cap
Bussmann Full Line Catalog
Bussmann Full Line Catalog
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
The LPS-RK-50SP uses a time-delay, dual-element, current-limiting design to protect motors and inductive loads. This combination reduces nuisance tripping and supports selective coordination with upstream fuses and breakers, making it ideal for motor control centers and panel feeders in industrial facilities. High interruption ratings deliver robust short-circuit protection, safeguarding equipment and minimizing downtime in environments with high fault currents up to 600 Vac. Ferrule-end terminations provide quick, secure installation and reduce wiring errors during maintenance, while electrically isolated end caps enhance safety during replacements in high-energy circuits. The compact 5.5 in length, 1.06 in width and height, and 2.6 lb weight integrate easily into standard Bussmann RK1 assemblies, with standard packaging of 10 per order. Compliance with CE marking and the RK1 class further simplifies procurement and cross-reference in procurement catalogs.
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FAQs
The LPS-RK-50SP uses ferrule-end x ferrule-end connections compatible with standard Bussmann RK1 fuse holders. Its 5.5 in length and 1.06 in cross-section fit common industrial enclosures, while the dual-element construction ensures reliable performance in motor control centers and distribution panels. Ensure clearances match the 2.6 lb unit and verify the packaging quantity aligns with your stocking requirements.
Key ratings include a 50 A amperage rating, 600 Vac and 300 Vdc voltage ratings, and interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. The fuse is time-delay and current-limiting, designed for quick response within the 10-second timeframe at 500% overcurrent, providing protection without excessive nuisance trips in motor and inductive circuits.
Class RK1 denotes a standardized, time-delay, dual-element fuse family designed for coordination with other protective devices. For the LPS-RK-50SP, this means predictable time-current characteristics, robust protection for motor loads, and compatibility with Bussmann RK1 catalog assemblies. CE marking confirms regulatory compliance for safety and environmental standards in many European markets.
The fuse features electrically isolated end caps to minimize arcing risk during replacement, and ferrule-end terminations provide secure, quick connections that reduce wiring mistakes. Its non-indicating indicator means you rely on protective device status at the system level rather than in-fuse signaling, which simplifies field maintenance in busy plant environments.
Datasheets and catalogs are available from Eaton’s Bussmann series, including the Bussmann Full Line Catalog and the no. 1001 data sheet on low-peak 600 V RK1 time-delay fuses. Downloading these documents provides detailed electrical characteristics, dimensional data, and installation guidelines to support specification, procurement, and cross-referencing in your bill of materials.