Eaton LPS-RK-90SP Fuse - Class RK1, 600 Vac 90A time-delay
Part Number: LPS-RK-90SP
Quick Summary
LPS-RK-90SP fuse by Eaton provides fast-acting protection for industrial power circuits and motor control centers. Nuisance trips during startup and surge events waste uptime; this unit’s time-delay design tolerates inrush without sacrificing protection. It’s CE marked and RoHS compliant, aligning with Class RK1 standards for consistent, dependable protection. In practice, this fuse supports reliable electrical protection and circuit reliability while enabling efficient maintenance and compliant installations in industrial environments.
Product Information
Extended Description
LPS-RK-90SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 90 A, non-indicating fuse, interrupting rating of 300 kA at 600 Vac and 100 kA at 300 Vdc
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-90SP
UPC
051712548441
Product Length/Depth
7.88 in
Product Height
1.11 in
Product Width
1.11 in
Product Weight
4 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
90 A
Interrupt rating
100 kAIC at 300 Vdc 300 kAIC at 600 Vac
Voltage rating
600 Vac, 300 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
1
Special features
Electrically isolated end cap
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Low-Peak 600 V LPS Class RK1 time-delay fuses, 70-600 A data sheet no. 1002
Feature: Time-delay dual-element design; Business Impact: Tolerates inrush currents common in motor starts, reducing unnecessary downtime; Application: Motor control centers and valve actuation circuits. Feature: 90 A rating with 600 Vac and 300 Vdc capabilities; Business Impact: Safeguards high-current loads while protecting DC control circuits; Application: Power distribution panels and machine tools. Feature: High interrupt ratings—300 kAIC at 600 Vac and 100 kAIC at 300 Vdc; Business Impact: Enhanced fault protection and system resilience; Application: Heavy industrial installations. Feature: Blade end x blade end connection with electrically isolated end caps; Business Impact: Easier, safer panel installation and maintenance; Application: New builds and retrofit projects. Feature: Non-indicating indicator; Business Impact: Reduces panel clutter while enabling strategic monitoring through remote indicators; Application: Control panels with centralized protection management. Feature: CE Marked, RoHS compliant; Business Impact: Simplifies regulatory compliance and sustainability goals; Application: Global industrial deployments requiring standardization.
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FAQs
The LPS-RK-90SP uses blade end x blade end connections and comes in standard packaging, making it compatible with common panelboard and motor control center housings. Its electrically isolated end caps aid safe maintenance, while the 7.88 in length fits many pre-wired rack spaces. Always verify clearance and wiring in accordance with IEC/UL standards before retrofit.
The fuse provides 90 A with voltage ratings of 600 Vac and 300 Vdc. It offers interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, enabling robust protection against short-circuit faults in both AC and DC portions of a system.
Yes. The time-delay, dual-element design is optimized for inrush tolerance typical in motor startup while maintaining current limiting, reducing nuisance trips and protecting downstream components like drives and contactors during startup surges.
The LPS-RK-90SP is CE marked and RoHS compliant, aligning with European regulatory requirements and environmental standards. It belongs to the Class RK1 family, ensuring consistent protection performance across similar fuses used in industrial power circuits.
Because the fuse is non-indicating, rely on system-level protection monitoring or remote indicators for status. Replace only with the same model to preserve interrupt ratings and time-delay characteristics. Regular preventive maintenance and spare-part stocking help minimize downtime and ensure quick restoration after a fault.