Eaton LPN-RK-150SPI Fuse - Class RK1, 300 kAIC
Part Number: LPN-RK-150SPI
Quick Summary
The LPN-RK-150SPI fuse from Eaton is a time-delay, current-limiting protection device designed for industrial motor circuits. It helps prevent nuisance trips during startup while reliably interrupting faults, reducing downtime and maintenance costs. CE marking confirms European safety compliance, while the RK1 class designation aligns with standard Bussmann fuse holders, and the dual-element design tolerates inrush without compromising protection. The indicating option provides status visibility in control panels, aiding preventive maintenance and quick diagnostics. This fuse delivers motor-protection reliability in harsh environments, while its blade-end connections simplify retrofit and field service. For engineers pursuing compliant, high-availability protection, LPN-RK-150SPI offers a strong balance of safety and efficiency.
Product Information
Extended Description
LPN-RK-150SPI Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 150 A, indicating fuse, interrupting rating of 300 kA at 250 Vac
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-150SPI
UPC
051712626767
Product Length/Depth
7.13 in
Product Height
1.61 in
Product Width
1.61 in
Product Weight
0.69 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
150 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
Connection
Blade end x blade end
Fuse indicator
Non-indicating With Indicator
Quantity
1
Special features
Indicating, High in-rush current motor protection
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: Time-delay, dual-element, current-limiting design. Business Impact: Enables controllable inrush handling and selective fault interruption, reducing downtime and extending motor life by avoiding unnecessary trips during startup. Application: Suitable for motor starters, conveyors, pumps, and HVAC drives where startup surges occur. Long-tail keyword: time-delay fuses for motors. Feature: High interrupt rating of 300 kAIC at 250 Vac. Business Impact: Provides robust fault current interruption for large-energy loads, improving system safety and reducing panel fault propagation. Application: Protective devices in large motors, drives, and automation panels with high fault currents. Long-tail keyword: 300 kAIC motor protection fuse. Feature: Class RK1 with Blade end x blade end connections and standard packaging. Business Impact: Ensures broad compatibility with common Bussmann fuse holders and easy installation in retrofit projects, minimizing cabinet modification costs. Application: OEM equipment and panel upgrades across industrial facilities. Long-tail keyword: RK1 class fuses, blade end connections. Feature: Indicating option for fuse status visibility. Business Impact: Quick fault location and reduced maintenance time since the indicator shows when protection is active or has tripped. Application: Control panels and machine interfaces requiring clear on/off/status indication. Long-tail keyword: indicating fuse for motor protection. Feature: Compliance and safety profile with CE marking. Business Impact: Supports European regulatory requirements and simplifies cross-border procurement for manufacturers and contractors. Application: Projects in EU-centric facilities and multinational installations. Long-tail keyword: CE marked fuses for European standards.
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FAQs
Install the LPN-RK-150SPI in RK1 compatible fuse holders with blade-end contacts. Ensure the mounting depth is consistent with the 7.13 in length and the 1.61 in width. Verify correct alignment to prevent poor contact, then secure with standard panel hardware. Use the indicating option to confirm status after installation and during commissioning.
The 300 kAIC interrupt rating ensures safe interruption of high-energy faults in 250 Vac systems, protecting upstream equipment and reducing the risk of arc flash or collateral damage. For large motors and drives, this rating supports reliable fault clearance without sacrificing service continuity during normal startup surges.
Yes. The LPN-RK-150SPI is a Class RK1 fuse designed for blade-end x blade-end connections, matching standard Bussmann RK1 holders and panel boards. Its standard packaging and dual-element construction simplify retrofits and OEM integrations while maintaining common protective coordination schemes.
The part is CE marked, indicating compliance with European safety requirements. While the data does not list additional certifications like SIL or IP ratings, CE marking supports conformity assessment for EU installations. Always verify site-specific compliance with local regulations and any supplier documentation when integrating into regulated environments.
The time-delay, dual-element design minimizes nuisance tripping during startup, reducing unplanned downtime. Its indicating option accelerates fault diagnosis, lowering maintenance labor costs. Over time, this can translate to lower energy waste from unnecessary trips, faster troubleshooting, and improved machine availability, delivering a favorable return on investment in automation-heavy facilities.