Eaton LPN-RK-45SP Fuse - Class RK1 Time-Delay, 45A
Part Number: LPN-RK-45SP
Quick Summary
The Eaton LPN-RK-45SP fuse provides time-delay protection for motor control circuits. Engineers often deal with nuisance tripping from inrush current during motor start, and this device helps tolerate that surge. With its dual-element design and 45 A rating, it safeguards drives and panels without compromising startup performance. It carries CE marking and aligns with Class RK1 standards, offering reliable overcurrent protection for 250 Vac and 125 Vdc systems. From a business perspective, the LPN-RK-45SP reduces downtime, simplifies spare-part stocking, and fits seamlessly into standard Bussmann series housings, supporting longer equipment life and lower maintenance costs.
Product Information
Extended Description
LPN-RK-45SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 45 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-45SP
UPC
051712538398
Product Length/Depth
3 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.124 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
45 A
Interrupt rating
100 kAIC at 125 Vdc 300 kAIC at 250 Vac
Response time
10 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
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 provides selective coordination and inrush tolerance, which reduces nuisance tripping during motor startups and improves productivity in packaging lines and material handling. Feature → Business Impact → Application: High interrupt rating up to 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc protects against severe short circuits without sacrificing startup performance in heavy equipment like conveyors and presses. Feature → Business Impact → Application: Compact 3 in length with ferrule end x ferrule end simplifies installation, enabling quick swaps in existing RK1 fuse holders and minimizing panel downtime. Feature → Business Impact → Application: Non-indicating status and specific motor-protection features deliver clear, low-maintenance operation in control panels and drive assemblies. Feature → Business Impact → Application: Standard packaging of 10 pieces per bundle improves procurement efficiency and inventory planning for maintenance teams across multiple manufacturing lines.
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FAQs
The LPN-RK-45SP uses ferrule-end terminations with a 3 in overall length and a 0.81 in width and height. It is designed for standard RK1 fuse holders, making replacement straightforward in existing Bussmann/Eaton assemblies. Each fuse is non-indicating and ships in standard packaging, typically 10 pieces per quantity.
This fuse is rated for 45 A with voltage ratings of 250 Vac and 125 Vdc. It provides an interrupt rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc, with a response time of 10 seconds at 500% overload. The combination supports robust protection for motor drives and critical circuits.
Yes. The LPN-RK-45SP is designed for high inrush motor protection due to its time-delay, dual-element construction. It tolerates startup surges while maintaining overcurrent protection, making it well-suited for motor starters, conveyors, pumps, and other drive applications in industrial panels.
The device carries CE marking and adheres to Class RK1 fuse standards, providing certified protection for industrial equipment. For broader environmental or RoHS-related considerations, consult Eaton’s compliance resources and the Bussmann catalog data sheets for detailed regulatory coverage.
The LPN-RK-45SP is packaged in standard Bussmann packaging with a common quantity of 10 pieces per bundle. This quantity helps maintenance teams stock spares efficiently while aligning with catalog ordering practices for panel rebuilds and routine replacements.