Eaton LPN-RK-70SP-TP Fuse - Class RK1, Time-delay
Part Number: LPN-RK-70SP-TP
Quick Summary
Eaton LPN-RK-70SP-TP fuse protects industrial control circuits with time-delay, current-limiting protection. Inrush surges and nuisance trips often drive costly downtime; this fuse mitigates that risk. Class RK1 certification and the ability to operate at 250 Vac and 250 Vdc support compliant, versatile protection across panels and machines. Beyond protection, it simplifies procurement and installation for panel builders and machine designers. The tin-plated blade contacts and standard 5.88 in length enable quick, reliable installation in Bussmann-series holders. Non-indicating design reduces maintenance overhead and visual clutter in crowded enclosures while delivering long-term reliability and predictable replacement cycles.
Product Information
Extended Description
LPN-RK-70SP-TP Eaton: Eaton Bussmann series LPN-RK fuse, 70 A, RK1, Non-indicating, Blade end x blade end, Time delay, Current-limiting, 300 kAIC at 250 V, 100 kAIC at 250 Vdc, Tin-plated, Standard, 250 V, 250 Vdc
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-70SP-TP
UPC
051712752299
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
Not Applicable
Amperage Rating
70 A
Interrupt rating
300 kAIC at 250 Vac 100 kAIC at 250 Vdc
Voltage rating
250 Vac, 250 Vdc
Fuse type
Time delay Current-limiting
Material
Tin-plated
Packaging type
Standard
Class
Class RK1
Connection
Blade end x blade end
Fuse indicator
Non-indicating
LPN-RK-70SP-TP~CLASS RK1 FUSE TIN PLATED
LPN-RK-70SP-TP~CLASS RK1 FUSE TIN PLATED
Bussmann series Fuseology
Eaton Specification Sheet - LPN-RK-70SP-TP
Time-delay operation allows temporary inrush to pass without immediate interruption, reducing nuisance trips while preserving circuit protection. This translates to decreased downtime and longer equipment life for motors and drives, with fewer unexpected stoppages during startup. The current-limiting feature quickly limits fault currents, protecting wiring insulation, contactors, and breakers from excessive stress and reducing repair costs after faults. Class RK1 designation and blade-end x blade-end connections simplify integration into standard Bussmann-series fuse holders, improving installation speed and compatibility with existing panels. Tin-plated material enhances corrosion resistance in humid or dusty environments, extending service life in harsh industrial settings. The 250 Vac and 250 Vdc voltage ratings, coupled with a 300 kAIC at 250 Vac and 100 kAIC at 250 Vdc interrupt capability, provide robust protection for mixed AC/DC systems, enabling safer, more reliable operation. Standard packaging and a compact 5.88 in length with 1.1 in width and height support easy stocking and straightforward replacement in dense enclosures. The non-indicating design reduces visual clutter, accelerating fault diagnosis and maintenance planning while maintaining reliable protection for critical loads.
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FAQs
Install the LPN-RK-70SP-TP in standard Bussmann-series fuse holders that support blade-end connections, ensuring proper alignment and seating. The device length is 5.88 inches with a 1.1 inch width and height, so verify enclosure clearance and mounting space before integration. Use compatible panelboard configurations and ensure conductor sizing accommodates the 70 A rating to avoid overheating.
This fuse provides a 70 A amperage rating with a 300 kAIC interrupt rating at 250 Vac and 100 kAIC at 250 Vdc. It is rated for 250 Vac and 250 Vdc operation, supporting mixed AC/DC applications while delivering reliable protection against short-circuit and overcurrent events.
Yes, it is suitable for DC circuits up to 250 Vdc, maintaining high interrupt capability (100 kAIC at 250 Vdc). Its RK1 class and current-limiting, time-delay design help protect DC drives and logic circuits from transient faults without excessive nuisance tripping.
The fuse is classified as Class RK1 and is designed for RK1 protection. While the data notes Not Applicable for some compliances, the RK1 class designation is the primary standard reference for this family, with tin-plated contacts and blade-end connections ensuring reliable mechanical and electrical compatibility in Bussmann-series assemblies.
The time-delay, current-limiting design reduces nuisance trips and limits fault currents, decreasing wear on upstream components and prolonging equipment life. Tin-plated contacts resist corrosion, improving longevity in harsh environments. Quick installation and standardized form factor shorten maintenance windows and stock diversity, delivering a favorable return on investment through lower downtime and fewer replacement parts.