Eaton LPN-RK-15SP Fuse - Class RK1 Time-Delay
Part Number: LPN-RK-15SP
Quick Summary
The LPN-RK-15SP is a time-delay, current-limiting fuse used in electrical protection circuits for motor drives and industrial controls. Engineers often struggle with nuisance trips during startup surges; this dual-element fuse minimizes inrush disturbances while protecting equipment. Key credentials include CE Marked and Class RK1 rating, with interrupting capability up to 300 kAIC at 250 VAC and 100 kAIC at 125 VDC. The compact ferrule-end construction supports quick panel installation, while its non-indicating design reduces misinterpretation in dense control cabinets. For project teams, the LPN-RK-15SP pairs with standard Bussmann series fuses, delivering reliable protection with a straightforward replacement path and predictable lifecycle.
Product Information
Extended Description
LPN-RK-15SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 15 A, non-indicating fuse, interrupting rating of 300 kA at 250 Vac and 100 kA at 125 Vdc
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-15SP
UPC
051712538329
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
15 A
Interrupt rating
100 kAIC Vdc 300 kAIC Vac
Response time
8 sec at 500%
Voltage rating
250 Vac, 125 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
Non-indicating, High in-rush current motor protection
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Low-Peak 250 V LPN Class RK1 time-delay fuses,1/10-60 A data sheet no. 1003
Feature: Time-delay, dual-element, current-limiting design. Business Impact: Smooths motor start-up, minimizes nuisance trips, and protects windings during surge events. Application: Motor drives, conveyors, and pumps in industrial automation. Feature: 15 A amperage rating. Business Impact: Appropriately sized protection for mid-range control circuits, reducing unnecessary outages while preserving equipment life. Application: Local control panels and small motor circuits. Feature: High interrupt ratings (300 kAIC Vac, 100 kAIC Vdc). Business Impact: Enhanced fault clearance margin, improving system safety and reducing downstream damage. Application: Equipment assemblies with potential high fault currents. Feature: Ferrule end x ferrule end connections. Business Impact: Easy, secure installation with standard panel hardware and quick replacements. Application: Replacements in serviceable control cabinets and junction boxes. Feature: Non-indicating fuse indicator. Business Impact: Reduces panel clutter; however, requires periodic verification to confirm fuse status. Application: Dense electrical enclosures in manufacturing lines. Feature: CE Marked and Class RK1 specification. Business Impact: Compliance-ready for European installations; predictable performance aligned with industry standards. Application: Global rollouts and OEM panel builds. In addition, its compact size, standard packaging (10 per pack), and compatibility with Bussmann series devices support efficient procurement and installation across automation projects, delivering measurable uptime gains and total cost of ownership improvements.
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FAQs
The LPN-RK-15SP uses ferrule-end x ferrule-end connections, allowing straightforward installation in standard panel setups. Ensure the fuse is seated correctly in its holder, verify alignment with the ferrule terminations, and torque connectors per your panel hardware specifications. This design supports quick replacement during routine maintenance and minimizes downtime.
This fuse is rated at 15 A with a voltage rating of 250 VAC and 125 VDC. It provides a high interrupt rating of 300 kAIC at 250 VAC and 100 kAIC at 125 VDC, with a time-delay characteristic designed for motor inrush. Its 8-second response at 500% fault current helps balance protection and continuity in demanding applications.
Yes. The LPN-RK-15SP is a dual-element time-delay, current-limiting fuse optimized for motor protection. Its design accommodates high inrush currents common to motors during startup, reducing nuisance trips while maintaining fast fault clearance. This makes it well-suited for motor drives, conveyors, and other automation equipment.
The fuse is CE marked and falls into Class RK1 protection, aligning with European and global electrical protection requirements. While it is not listed with SIL or IP certifications in this data, the CE Marked status and RK1 class provide robust, industry-acceptable protection for many industrial panels and machinery deployments.
By minimizing nuisance trips during startup and delivering predictable lifecycle performance, the LPN-RK-15SP helps reduce downtime and maintenance costs. Its standard Ferrule-end design simplifies replacements, and the replacement cadence for Bussmann series fuses tends to be lower in high-usage automation environments, improving overall equipment availability.