Eaton LPN-RK-2-1/2SP Fuse - Class RK1, Time-Delay
Part Number: LPN-RK-2-1/2SP
Quick Summary
The LPN-RK fuse is a time-delay, current-limiting protection device designed for motor loads and control circuits. Engineers often grapple with nuisance trips caused by inrush currents during startup, which can lead to unplanned downtime. This CE-marked fuse belongs to the Bussmann Series Class RK1 family and combines a dual-element design with fast fault clearing to safeguard equipment. With a 2.5 A rating and high interrupt capabilities (300 kAIC at 250 Vac and 100 kAIC at 125 Vdc), it delivers reliable protection for panels and drives, while supporting easy stocking and installation in standard cabinets. It also aligns with common procurement practices by offering standard packaging and ferrule-end connections for quick integration.
Product Information
Extended Description
LPN-RK-2-1/2SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 2.5 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-2-1/2SP
UPC
051712538169
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
2.5 A
Interrupt rating
100 kAIC at 125 Vdc 300 kAIC at 250 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
Indicating, High in-rush current motor protection
Bussmann Full Line Catalog
Bussmann Full Line Catalog
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 handles motor inrush and startup surges without nuisance tripping, improving uptime and reducing wear on drives. This translates to more reliable production lines and lower maintenance costs in machinery and conveyor systems. Application: motor starters, drives, and other motor-protection scenarios where startup inrush is a concern. Feature → Business Impact → Application: 2.5 A amperage rating paired with 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc ensures rapid fault clearance while maintaining selective protection, safeguarding downstream components and reducing collateral damage. Application: branch circuits and control cabinets in industrial automation. Feature → Business Impact → Application: Class RK1 construction with ferrule-to-ferrule end connections provides a robust, vibration-resistant installation that stays secure in harsh environments. Application: panel boards and equipment enclosures in machinery installations. Feature → Business Impact → Application: Non-indicating indicator avoids false signals and minimizes maintenance overhead, while the special dual-element design supports high inrush current motor protection. Application: energy-intensive automation in manufacturing. Feature → Business Impact → Application: Compact 2-inch length with 0.56 x 0.56 inch profile and standard packaging (10 per package) simplifies stocking, reduces fulfillment time, and lowers warehouse costs. Application: high-volume replacement in control panels and distribution boards.
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FAQs
The LPN-RK-2-1/2SP is a time-delay, dual-element fuse ideal for motor protection and control circuits in industrial automation. It handles inrush currents during startup while providing current-limiting protection, making it well-suited for drives, conveyors, and line-side protection in control cabinets.
This fuse is rated at 2.5 A with interrupt ratings of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc, plus a voltage rating of 250 Vac / 125 Vdc. These specifications ensure fast fault clearance and selective protection for critical equipment.
Yes. The fuse features ferrule-end x ferrule-end connections, designed for secure, plug-in installation in standard Bussmann RK1 holders and compatible control panels.
The fuse ships in standard packaging with a quantity of 10 per package, facilitating bulk stocking for high-volume maintenance and rapid replacement in manufacturing environments.
The device is CE Marked, indicating compliance with European safety requirements, and it belongs to the Class RK1 family, aligning with widely adopted industry protection standards.