Eaton LPS-RK-20SP fuse - Class RK1 time-delay
Part Number: LPS-RK-20SP
Quick Summary
LPS-RK-20SP fuse provides time-delay, current-limiting protection for industrial power circuits and motors, helping prevent nuisance trips during startup. In tight control panels and crowded switchgear, inrush surges have caused outages and maintenance; this device mitigates that risk with a deliberate delay. It carries CE marking for European compliance and aligns with RoHS standards, supporting global deployments. With a 20 A rating and interrupting ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, this fuse delivers reliable protection while enabling compact layouts in modern switchgear and panelboards. The RK1 design uses ferrule-end terminations, aligning with standard Bussmann footprints for easy stocking and installation across new builds or retrofit projects.
Product Information
Extended Description
LPS-RK-20SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 20 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-20SP
UPC
051712548342
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
20 A
Interrupt rating
100 kAIC at 300 Vdc 300 kAIC at 600 Vac
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
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
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: Time-delay, dual-element design provides current-limiting protection with controlled response to inrush. Business Impact: Minimizes nuisance trips during motor startups and protects wiring from arc-flash risk, lowering maintenance costs. Application: Ideal for motor control centers, VFD interfaces, and panelboard protection in manufacturing lines. Feature: 20 A rating with 600 Vac / 300 Vdc ratings and high interrupt ratings. Business Impact: Enables fast fault isolation while protecting downstream equipment; improves uptime in critical manufacturing processes. Application: Suitable for power distribution blocks, drives, and machines. Feature: Class RK1 fuse, ferrule-end connections, non-indicating design. Business Impact: Easy retrofit with standard footprints, simplifying maintenance and replacements. Application: Used in control panels and distribution boards. Feature: CE marking and RoHS alignment. Business Impact: Supports global deployment and regulatory compliance across international facilities. Application: Global manufacturing lines requiring compliant protective devices. Feature: Compact, standard packaging of 10 units. Business Impact: Reduces spare part inventory and accelerates field servicing. Application: Dense panels and retrofit projects where space is at a premium.
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FAQs
The LPS-RK-20SP uses ferrule-end x ferrule-end connections and follows the standard RK1 footprint, simplifying retrofits and new installations in existing Bussmann series panels.
It provides a 20 A rating with 600 Vac and 300 Vdc voltage ratings, and an interrupting rating of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, with time-delay, dual-element protection.
Yes. The time-delay, current-limiting design helps tolerate motor startup inrush while still delivering fast fault isolation, making it ideal for motor control centers and panelboards.
The device is CE marked and aligned with RoHS standards, supporting compliant deployment in EU markets and global facilities that require RoHS considerations.
By reducing nuisance trips and improving reliability during startup, the fuse lowers downtime, extends equipment life, and simplifies stock management through standard RK1 footprints and packaging.