Eaton LPS-RK-45SP Fuse - Class RK1, 600 Vac
Part Number: LPS-RK-45SP
Quick Summary
The Eaton LPS-RK-45SP fuse provides time-delay protection for industrial power circuits. Design engineers often battle nuisance trips and downtime from protection schemes that aren't tuned for variable loads. It is CE marked and uses the Class RK1 design, delivering reliable fault interruption with a dual-element fuse and robust interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. As a compact, low-voltage solution for control panels and motor feeders, it helps reduce maintenance costs and streamline procurement across global sites. Its ferrule-end construction and electrically isolated end caps promote safe, straightforward installation in tight enclosures. Together with Eaton's application notes, the LPS-RK-45SP supports commissioning engineers in achieving compliant, reliable protection with minimal design effort.
Product Information
Extended Description
LPS-RK-45SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 45 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-45SP
UPC
051712548397
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
45 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
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
Time-delay, dual-element design provides selective protection for motor start-ups and surge-heavy loads. Business impact – minimizes nuisance trips and protects expensive drives, reducing unplanned downtime and warranty repairs. Application – ideal for motor starters, control panels, and feeders where controlled inrush is expected and reliable interruption is essential. High interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc ensure safe fault isolation in high-energy circuits, improving system availability. Application – main feeders and protection blocks in demanding industrial environments benefit from robust protection and fast clearance. Non-indicating fuse with ferrule end x ferrule end and electrically isolated end caps enhances maintenance safety and reduces the risk of accidental contact during service. Application – safe, straightforward replacement in enclosed panels. Compact form factor (5.5 in length, 1.06 in width, 1.06 in height) and weight of 2.6 lb, with standard packaging of 10 units, simplify panel design, stocking, and logistics for global deployments. Application – fits standard industrial enclosures and streamlines procurement workflows. Compliance-friendly design with CE marking and Class RK1 classification supports global installations, while the dual-element, current-limiting characteristics align with modern protection strategies in low-voltage automation. Application – widely used in control cabinets, motor control centers, and distribution panels.
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FAQs
Install the LPS-RK-45SP with ferrule-end terminations to ensure reliable connections and consistent torque. The unit’s 5.5 in length and 1.06 in cross-section fit standard panel cutouts, while its 2.6 lb weight supports stable mounting. Use electrically isolated end caps to minimize touch-safety concerns during maintenance, and plan for a 10-unit packaging quantity to streamline stocking and replacements across multiple panels.
The fuse is rated for 45 A with a voltage rating of 600 Vac and 300 Vdc. It provides a 300 kAIC interrupt rating at 600 Vac and 100 kAIC at 300 Vdc, enabling rapid fault clearance in high-energy circuits. The 10-second response time at 500% overload offers a controlled delay that accommodates startup transients without sacrificing protection, improving equipment uptime and reliability.
Yes. The LPS-RK-45SP’s time-delay, dual-element design is well-suited for motor starters and feeders where inrush is common. Its current-limiting capability protects downstream drives and cables from short circuits while reducing nuisance trips, making it a strong fit for manufacturing lines, conveyors, and process equipment protection schemes.
This fuse is CE marked, aligning with European safety requirements for electrical protection devices. The Class RK1 designation supports industry-standard coordination across protection systems. While the data does not specify additional certifications, CE Marking and the RK1 class form the core compliance baseline for global installations.
The LPS-RK-45SP reduces maintenance downtime thanks to its reliable fault interruption and predictable response, minimizing unplanned outages. Its non-indicating design simplifies field maintenance, while the standard packaging of 10 units and ferrule-end terminations streamline stocking and replacement. Overall, the fuse helps lower total cost of ownership through improved reliability and easier procurement.