Eaton LPS-RK-9SPI Fuse - Class RK1, 300 kAIC, Time-delay
Part Number: LPS-RK-9SPI
Quick Summary
The Eaton LPS-RK-9SPI fuse provides time-delayed, current-limiting protection for electrical distribution in industrial control panels. Nuisance trips during motor starts and inrush events are a frequent pain point for designers trying to balance protection with uptime. This product is CE marked and RoHS compliant, with Class RK1 designation delivering reliable selective coordination and high fault-current clearing. Designed for compatibility with standard Bussmann RK1 mounting and performance in rugged environments, it supports predictable maintenance, reduced downtime, and a lower total cost of ownership. By choosing the LPS-RK-9SPI, engineers gain a measurable margin in system reliability while meeting industrial safety and compliance requirements.
Product Information
Extended Description
LPS-RK-9SPI Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 9 A, indicating fuse, interrupting rating of 300 kA at 600 Vac
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-9SPI
UPC
051712628471
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
1.6 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
9 A
Interrupt rating
300 kAIC at 600 Vac 100 kAIC at 300 Vdc
Response time
10 sec at 500%
Voltage rating
600 Vac, 300 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating With Indicator
Quantity
10
Special features
Electrically isolated end cap
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Low-Peak 600 V LPS Class RK1 time-delay fuses, up to 600 A data sheet no. 1001
Feature → Business Impact → Application: Time-delay, dual-element, current-limiting design enables safe handling of motor inrush while preserving fast fault clearance, reducing nuisance trips and maintenance costs in motor control circuits. This translates to improved uptime and predictable performance in drives, feeders, and panel boards. Feature → Business Impact → Application: 9 A rating with 600 Vac and 300 kAIC at 600 Vac ensures protection for medium-power loads in high-energy environments, delivering reliable short-circuit clearance and plant-wide safety in power distribution systems. Feature → Business Impact → Application: Class RK1 construction with options for non-indicating or indicating variants and an electrically isolated end cap simplifies maintenance and enhances safety during servicing in control panels and switchgear. Feature → Business Impact → Application: RoHS and CE compliance provide regulatory alignment for global deployments, while standard RK1 compatibility and 5 inch length support plug‑and‑play installation in existing Bussmann RK1 footprints. Feature → Business Impact → Application: 10-pack packaging and standardized dimensions reduce spare-stock costs and streamline procurement for OEMs and integrators working on machine builds and line upgrades.
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FAQs
The Eaton LPS-RK-9SPI fuse provides reliable protection for electrical distribution and motor circuits in industrial control panels. As a time-delay, dual-element, current-limiting device in Class RK1, it allows normal inrush currents during motor start-ups while delivering fast fault clearance during short circuits. It is well-suited for motor starters, drives, feeders, and panel-board protection, enabling selective coordination with downstream protection devices.
It is rated at 9 A and 600 Vac, with an interrupt rating of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. The response time is about 10 seconds at 500% overload, and the device uses dual-element construction for higher reliability. The voltage rating includes 600 Vac and 300 Vdc, suitable for mixed AC and DC circuits in industrial settings.
Yes. The LPS-RK-9SPI is CE marked and RoHS compliant, aligning with global safety and environmental requirements. As a Bussmann RK1 class fuse, it is designed to meet coordination and clearance needs in industrial power distribution while maintaining compliance with European and international standards.
Class RK1 is a standardized fuse classification that combines time-delay characteristics with current-limiting protection. This means the fuse tolerates short inrush surges typical of motors and drives while still providing rapid fault clearing during faults. The dual-element design enhances reliability and coordination with upstream devices, reducing nuisance trips and improving system uptime.
The LPS-RK-9SPI is compatible with standard RK1 mounting footprints and features a 5 in length with a 0.81 in width and height profile. It includes an electrically isolated end cap for safer maintenance and is packaged in standard, 10‑pack quantities for easy stocking. This makes replacement and upgrades straightforward in panel boards, motor control centers, and feeders.