Eaton LPN-RK-500SPI Fuse - Class RK1, 300 kAIC
Part Number: LPN-RK-500SPI
Quick Summary
Eaton LPN-RK-500SPI fuse provides reliable overcurrent protection for motor drives and panel boards in industrial automation. When selecting fuses, engineers often struggle with balancing protection with nuisance trips and space constraints. This device belongs to the Bussmann Class RK1 family and combines time-delay operation with dual elements for current limiting, rated at 500 A and offering 300 kAIC interrupt rating at 250 Vac and 100 kAIC at 250 Vdc. The CE marked device ships with carefully engineered end caps that facilitate safe installation and consistent heat dissipation. For maintenance planning and procurement, the 1-unit packaging simplifies part stocking while delivering robust protection in power distribution and automation applications.
Product Information
Extended Description
LPN-RK-500SPI Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 500 A, indicating fuse, interrupting rating of 300 kA at 250 Vac
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-500SPI
UPC
051712626859
Product Length/Depth
10.38 in
Product Height
2.88 in
Product Width
2.88 in
Product Weight
0.03 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
500 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
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating With Indicator
Quantity
1
Special features
Electrically isolated end cap
Bussmann series Class J Low-Peak fuse 70-600A data sheet No. 1007
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Feature is time-delay, dual-element, current-limiting design → Business Impact reduces nuisance trips while protecting equipment during inrush events → Application ideal for motor drives and power distribution panels. Feature is 500 A amperage rating → Business Impact supports high-load circuits without compromising protection → Application suitable for feeder circuits in industrial automation. Feature is 300 kAIC interrupt rating at 250 Vac (and 100 kAIC at 250 Vdc) → Business Impact enables fast fault clearance in high-current environments → Application for sites with high fault current such as VFD drives and switchgear. Feature is 250 Vac / 250 Vdc voltage rating → Business Impact permits operation across both AC and DC distribution networks → Application in mixed-voltage industrial panels. Feature is electrically isolated end cap and optional indicator version → Business Impact enhances safe maintenance and fault diagnostics → Application in panel assemblies where service safety and visibility are priorities. Feature is Class RK1 fuse family compatibility and non-indicating or indicating variants → Business Impact simplifies procurement and asset tracking while aligning with existing protection schemes → Application across standard electrical protection layouts in manufacturing and process industries.
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FAQs
When installing the LPN-RK-500SPI, ensure proper mounting to standard panel rails and secure busbar connections to prevent loose contact. Observe torque specifications for end caps and avoid cross-threading during assembly. Decide between indicating and non-indicating variants, and note that the electrically isolated end caps support safer maintenance and heat dissipation within enclosures.
The fuse is rated for 500 A with a 300 kAIC interrupt rating at 250 Vac and 100 kAIC at 250 Vdc, meaning it can safely interrupt high fault currents typical of industrial power systems. It supports 250 Vac and 250 Vdc, offering protection across both AC and DC distribution. These specs translate to reliable fault clearance and reduced equipment damage during faults.
Yes, the LPN-RK-500SPI supports 250 Vdc and is designed for protection in DC distribution as well as motor drives and automation equipment. Its time-delay, dual-element design helps accommodate motor inrush currents while still providing current-limiting protection, making it suitable for control panels, drives, and other automation hardware.
The LPN-RK-500SPI is CE marked, which confirms European compliance for electrical safety and performance. It also belongs to Eaton’s Bussmann RK1 class fuse family, a widely adopted protection standard in industrial panels. When sourcing, verify local regulatory requirements and compatibility with CE-marked components in your control panels.
Key ROI considerations include reduced downtime due to lower nuisance trips from the time-delay dual-element design, and safer maintenance with electrically isolated end caps. Regular inspection of indicator options (if chosen) helps fast fault diagnostics. Stocking a standard 1-unit package simplifies procurement and improves inventory turnover for typical protection schemes in panels and drives.