Eaton LPS-RK-400SP Fuse - Class RK1, Time-Delay, Current-Limiting

Part Number: LPS-RK-400SP
Manufacturer
Eaton
Part number
LPS-RK-400SP

Quick Summary

The Eaton LPS-RK-400SP fuse delivers time-delay protection for industrial power distribution and motor circuits. It minimizes nuisance trips during inrush and start-up while maintaining selective coordination to protect critical loads. As part of the Class RK1 family, it is RoHS compliant and CE marked, supporting global compliance and safer installations. With a 400 A rating and 600 Vac / 300 Vdc capability, this Bussmann series device reduces downtime and maintenance costs in high-current systems. The blade-end design and electrically isolated end caps simplify field replacement and ensure compatibility with common panel and switchgear. Designed for OEMs seeking durable, code-compliant protection, it delivers reliable performance across industrial environments.

Product Information

Extended Description

LPS-RK-400SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 400 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-400SP
UPC
051712548557
Product Length/Depth
11.63 in
Product Height
2.36 in
Product Width
2.36 in
Product Weight
4.6 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Amperage Rating
400 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
Feature: Time-delay, dual-element, current-limiting design. Business Impact: Enables dependable protection for equipment with moderate inrush while constraining fault energy to protect conductors, reducing downstream damage and maintenance. Application: Motor feeders, motor control centers, and power distribution panels benefit from controlled inrush and reliable fault clearing without unnecessary disconnections. Feature: High amperage and interrupt ratings. Business Impact: Safely interrupts high fault currents up to 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, enhancing protection for feeders and sensitive equipment. Application: Large industrial machines and distribution circuits in harsh environments where fault energy is critical. Feature: Class RK1, RoHS compliant, CE marked. Business Impact: Supports global procurement, regulatory compliance, and safer, coordinated protection schemes. Application: Global OEM deployments across diverse markets require standardized, compliant protection. Feature: Blade-end x blade-end connections with electrically isolated end caps. Business Impact: Simplifies installation, reduces mis-wiring risk, and enables quick field replacement in existing blade-block protection systems. Application: Retrofit into switchgear and control panels or new builds using standard blade-end interfaces. Feature: Non-indicating indicator and standard packaging. Business Impact: Reduces panel complexity and maintenance cost while delivering a compact, economical protection solution. Application: Low-profile protection in compact control panels and centralized protection blocks.

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FAQs

The LPS-RK-400SP uses blade-end x blade-end connections and features electrically isolated end caps, enabling straightforward installation in standard blade-block protection systems and easy field replacement in switchgear.
It provides a 400 A amperage rating with interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, along with voltage ratings of 600 Vac and 300 Vdc.
Yes. Its time-delay, dual-element, current-limiting design supports inrush tolerance and fast fault clearing, making it well-suited for motor feeders and power distribution panels in industrial environments.
The LPS-RK-400SP is RoHS compliant and CE marked, aligning with global safety and environmental standards for international installations.
Length 11.63 in, width 2.36 in, height 2.36 in, and weight 4.6 lb, facilitating straightforward packaging, mounting, and panel integration.