Eaton LPN-RK-70SP Fuse - Class RK1 Time-Delay
Part Number: LPN-RK-70SP
Quick Summary
The LPN-RK-70SP Fuse from Eaton provides time-delay overcurrent protection for control panels and motor circuits. This design addresses nuisance trips during startup by balancing fast interruption with inrush tolerance. It carries RoHS compliant and CE marking, with Class RK1 designation and dual-element current-limiting features to protect wiring and devices. For procurement and compliance, this fuse aligns with industrial low-voltage protection needs while delivering reliable performance in harsh environments. Engineers benefit from easy integration, standard enclosure fit, and predictable maintenance impact, supporting safer, more efficient panel designs and streamlined spares management.
Product Information
Extended Description
LPN-RK-70SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 70 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-70SP
UPC
051712538428
Product Length/Depth
5.88 in
Product Height
1.1 in
Product Width
1.1 in
Product Weight
1.5 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Amperage Rating
70 A
Interrupt rating
100 kAIC at 250 Vdc 300 kAIC at 250 Vac
Voltage rating
250 Vac, 250 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Quantity
5
Special features
Electrically isolated end cap
Bussmann series Class J Low-Peak fuse 70-600A data sheet No. 1007
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Feature → Business Impact → Application: Time-delay, dual-element, current-limiting operation reduces nuisance tripping during motor inrush, improving uptime and reducing maintenance costs. This delivers selective protection for power distribution and control circuits, especially in manufacturing lines and process automation. Application: motor drives, control panels, and feeder circuits in industrial environments. Feature → Business Impact → Application: 70 A amperage rating provides robust protection for mid-range loads with predictable protection curves, enabling lower fuse replacement frequency and reduced downtime. Application: panel feeders and circuit branches in energy-intensive equipment. Feature → Business Impact → Application: 5.88 in length and 1.1 in width with blade-end connections supports easy retrofits in standard enclosures, minimizing cabinet modification and installation time. Application: retrofit projects and new builds in electrical panels. Feature → Business Impact → Application: 300 kAIC interrupt rating at 250 Vac ensures high fault tolerance for critical circuits, safeguarding equipment and reducing arc-flash risk. Application: main feeder protection and high-energy motor circuits. Feature → Business Impact → Application: RoHS compliant and CE marked simplifies global sourcing, supplier qualification, and regulatory compliance. Application: multinational manufacturing sites and cross-border projects. Feature → Business Impact → Application: Pack quantity of five supports cost-effective spares and streamlined procurement for service teams. Application: maintenance planning and inventory control.
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FAQs
The LPN-RK-70SP uses blade end x blade end terminals and features electrically isolated end caps for safe maintenance. Its 5.88 in length and 1.1 in width fit standard panel footprints, simplifying retrofits. Ensure enclosure clearance is adequate and verify compatibility with standard RK1 fuse holders and blade connectors prior to mounting.
This fuse combines time-delay behavior with dual-element current limiting, allowing inrush currents typical of motor starts while protecting downstream circuitry. With a 70 A rating and 300 kAIC interrupt capability at 250 Vac, it reduces nuisance trips and limits fault energy, improving motor life and overall system uptime.
Yes. The LPN-RK-70SP is rated for 250 Vac and 250 Vdc, with a high interrupt rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc. This makes it suitable for mixed-supply control panels and equipment that transition between AC and DC bussing in industrial environments.
The fuse is RoHS compliant and CE marked, supporting regulatory compliance in many global markets. This simplifies supplier qualification and procurement for multinational facilities, ensuring that the part meets restrictive environmental and safety requirements without additional certifications.
By combining reliable time-delay protection with high interrupt ratings and durable construction, the LPN-RK-70SP reduces downtime from nuisance trips and protects costly motors and drives. Its 5-pack packaging and standard enclosure fit improve procurement efficiency and stock management, delivering lower maintenance costs over the panel lifecycle.