Eaton LPN-RK-17-1/2SP Fuse - Time-delay Class RK1
Part Number: LPN-RK-17-1/2SP
Quick Summary
Eaton Bussmann LPN-RK fuse provides time-delay protection for motors in industrial automation. Engineers often contend with nuisance trips during startup, which can cause costly downtime and reduced line efficiency. This device combines a Class RK1 design with a 300 kAIC interrupt rating at 250 Vac and a dual-element, current-limiting construction to deliver reliable protection in demanding environments. CE marking supports compliant European installations, while the rugged ferrule-end connections and compact footprint simplify panel integration. For expandability and sourcing consistency, this fuse fits seamlessly into typical Bussmann series low-voltage protection schemes, helping you optimize maintenance cycles and overall system availability.
Product Information
Extended Description
LPN-RK-17-1/2SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 17.5 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-17-1/2SP
UPC
051712538336
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
17.5 A
Interrupt rating
300 kAIC at 250 Vac 100 kAIC at 125 Vdc
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
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 → Business Impact → Application: Time-delay, dual-element design provides current-limiting protection with extended motor inrush tolerance, reducing nuisance trips and helping maintain production uptime in conveyors, pumps, and machine tools. This translates to measurable efficiency gains and lower maintenance costs in automated lines. Feature → Compatibility → Application: Ferrule-end connections paired with a 2 in length and 0.56 in footprint fit standard fuse holders, enabling quick replacements and minimal control panel rework during retrofits or new builds. Feature → Compliance & Safety → Application: CE Marked with Class RK1, the fuse supports regulatory requirements in European installations and aligns with established safety practices for electrically protected machinery. Feature → Performance → Application: High interrupt rating of 300 kAIC at 250 Vac (and 100 kAIC at 125 Vdc) ensures robust protection for motor drives, inverters, and control circuits in harsh industrial environments. Feature → Reliability → Application: Non-indicating visual design minimizes false diagnostics in harsh factory settings, while standard packaging of 10 units ensures predictable stocking for maintenance teams. Feature → Operational Insights → Application: 8-second response time at 500% surge provides dependable protection against transient faults in high-inrush loads, supporting motor-start sequencing and drive protection strategies.
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FAQs
To install, verify the panel voltage matches 250 Vac or 125 Vdc, select a compatible fuse holder with ferrule-end connections, and insert the 2 in long LPN-RK-17-1/2SP into the holder. Ensure the unit is seated fully and the circuit is de-energized during replacement. The standard packaging is 10 fuses per package for easy stocking.
Key specs include a 17.5 A amperage rating, 250 Vac and 125 Vdc voltage ratings, and a 300 kAIC interrupt rating at 250 Vac (100 kAIC at 125 Vdc). It is a time-delay, dual-element, current-limiting fuse with an 8-second response time at 500% surge, suitable for motor protection in automation.
Yes. The LPN-RK-17-1/2SP is designed for motor protection with time-delay characteristics that tolerate startup inrush, paired with a high interrupt rating to guard downstream circuitry. Its dual-element design helps manage short-duration faults, reducing nuisance trips without compromising protection for drives and motors in conveyors, pumps, and packaging lines.
This fuse is CE Marked and classified as Class RK1, aligning with European installation standards and Bussmann series protection practices. While RoHS information can be confirmed via Eaton's compliance tools, the critical certifications listed here ensure suitability for standard industrial control panel applications.
The LPN-RK-17-1/2SP is available in standard packaging of 10 fuses per unit. This arrangement supports project-wide stocking and quick takeoffs for panel builds or retrofits. For procurement, reference the catalog number LPN-RK-17-1/2SP and plan alongside other Bussmann class RK1 fuses in low-voltage protection assemblies.