Eaton LPN-RK-50SP Fuse - RK1 Time-Delay Current-Limiting
Part Number: LPN-RK-50SP
Quick Summary
Eaton LPN-RK-50SP fuse provides time-delay, current-limiting protection for industrial power circuits. Sourcing reliable fuses that manage surges without nuisance trips can complicate maintenance schedules. CE Marked for EU safety and RoHS compliant via Eaton's RoHS tool, this Class RK1 device delivers dependable protection with optional ferrule-end terminations. Designed for easy panel integration, it supports quick swaps and standardized replacement across assemblies. Procurement and maintenance teams benefit from predictable performance, RK1 compatibility, and OEM-friendly packaging in a 10-pack configuration.
Product Information
Extended Description
LPN-RK-50SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 50 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-50SP
UPC
051712538404
EAN
5027590416979
Product Length/Depth
0.81 in
Product Height
2.99 in
Product Width
0.81 in
Product Weight
0.13 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
50 A
Interrupt rating
100 kAIC at 250 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
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 250 V LPN Class RK1 time-delay fuses,1/10-60 A data sheet no. 1003
Time-delay, current-limiting protection in a Class RK1 dual-element fuse reduces nuisance trips during motor inrush and transient faults, delivering smoother equipment operation and reduced downtime in industrial cabinets. The 50 A rating paired with a 300 kAIC interrupt rating at 250 VAC ensures rapid fault clearance for high-current faults, while preserving normal operation under brief surges. This fuse is ideal for control panels and power distribution where selective coordination matters, enabling safer maintenance and easier replacement by technicians. Ferrule-end terminations and electrified end caps provide safe, tool-friendly installations with reduced risk of arcing during service. The non-indicating design simplifies stock management, and RoHS compliance alongside CE marking gives peace of mind for global deployments and regulatory alignment.
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FAQs
To install the LPN-RK-50SP, verify the catalog number and amperage rating, ensure ferrule-end terminations mate with the panel terminals, and power down the equipment before replacement. Remove the old fuse, insert the new LPN-RK-50SP with proper alignment, secure the ferrule ends, and re-energize. Confirm operation with a functional test after replacement and inspect for end-cap isolation per safety guidelines.
The LPN-RK-50SP provides an interrupt rating of 300 kAIC at 250 VAC and 100 kAIC at 125 VDC, with voltage ratings of 250 VAC and 125 VDC. The device is a 50 A, time-delay, current-limiting fuse designed for robust protection in high-inrush environments, such as motor drives and power distribution circuits.
Yes. Its time-delay, dual-element design accommodates motor starting surges while providing current-limiting protection, reducing nuisance trips. Use in motor control panels or power distribution where short-duration inrush is expected, and ensure coordination with upstream protection to optimize selectivity and minimize downtime.
The LPN-RK-50SP is CE marked, signaling EU safety compliance, and is RoHS compliant as verified via Eaton’s RoHS tool. It follows Class RK1 fuse standards, with non-indicating indicators and ferrule-end terminations designed for safe, compliant installations in modern control panels.
RK1 fuses offer predictable performance with standardized dimensions and terminations, simplifying stocking and replacement. The time-delay design reduces nuisance trips, lowering maintenance interruptions, while high interrupt ratings protect downstream equipment from faults. Packaging in a 10-pack helps OEMs maintain inventory efficiency and shorten downtime during panel upgrades or expansions.