Eaton LPS-RK-3-1/2SP Fuse - Class RK1, CE Marked
Part Number: LPS-RK-3-1/2SP
Quick Summary
The Eaton LPS-RK-3-1/2SP fuse provides reliable overcurrent protection for industrial control panels, motor drives, and power distribution systems. When nuisance trips or mismatched interrupt ratings derail uptime, engineers need protection that matches both protection goals and installation realities. This Class RK1, time-delay, dual-element fuse is CE marked and engineered for high fault currents, with an interrupt rating up to 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. With a compact 5 in length, ferrule-end connections, and standard 10-pack packaging, it supports straightforward procurement, faster replacements, and predictable maintenance schedules.
Product Information
Extended Description
LPS-RK-3-1/2SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 3.5 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-3-1/2SP
UPC
051712548205
EAN
5027590173049
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.17 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
3.5 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
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
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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 delivers reliable protection during motor startup and short surges. Business Impact: Minimizes unnecessary trips while still clearing dangerous faults quickly, reducing downtime and maintenance costs. Application: Ideal for industrial control panels, conveyors, and automation gear where inrush currents are common. Paragraph 2: Feature: Current-limiting performance curbs arc energy and conductor damage during fault events. Business Impact: Improves safety and extends component life by keeping fault currents within safe limits. Application: Power distribution panels and motor feeders in manufacturing lines. Paragraph 3: Feature: Amperage rating of 3.5 A with a 600 Vac / 300 Vdc rating. Business Impact: Provides precise protection for small-control circuits while maintaining compatibility with mixed-voltage systems. Application: Control circuits and low-amperage protection in automation equipment. Paragraph 4: Feature: High interrupt ratings—300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. Business Impact: Enables protection in high-current feeders without sacrificing selectivity. Application: Heavy machinery and feeder circuits in plant environments. Paragraph 5: Feature: Class RK1 fuse construction with ferrule-end connections. Business Impact: Facilitates fast, secure field replacement in standard RK1 holders; reduces wiring errors and downtime. Application: Retrofit projects and OEM assemblies in control panels. Paragraph 6: Feature: Standard packaging of 10 fuses per package supports streamlined procurement. Business Impact: Simplifies stocking, reorder cycles, and on-site maintenance planning. Application: OEM manufacturing lines and service teams.
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FAQs
Install the LPS-RK-3-1/2SP in a compatible RK1 fuse holder using ferrule-end connections as designed. Verify the panel is rated for 600 Vac and that the circuit current remains around the 3.5 A rating. Replace with the same model from the standard 10-piece packaging to maintain consistency and minimize downtime.
The fuse features a 3.5 A amperage rating, voltage ratings of 600 Vac and 300 Vdc, and interrupt ratings of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. It is time-delay, dual-element, current-limiting, with a Class RK1 designation and ferrule-end connections for easy installation.
Yes. The time-delay, dual-element design tolerates motor inrush while protecting conductors from overload. Its 3.5 A rating fits small control circuits, and its high interrupt ratings safeguard feeders feeding motors and drives in industrial automation environments.
This fuse is CE marked, aligning with EU safety and health requirements. It also adheres to Class RK1 fuse standards, ensuring compatibility with Bussmann LPS series holders and reliable protection in standard industrial panels.
The LPS-RK-3-1/2SP reduces downtime through robust short-circuit protection and fewer nuisance trips, while its high interrupt ratings protect upstream equipment. Standard 10-piece packaging lowers stocking costs and ensures quick replacements, delivering faster maintenance cycles and predictable procurement for OEMs and service teams.