Eaton LPS-RK-400SP-TP Fuse - RK1 Class Time-Delay
Part Number: LPS-RK-400SP-TP
Quick Summary
The Eaton LPS-RK-400SP-TP fuse provides rugged high-current protection for industrial power circuits in control panels. Engineers face nuisance trips, downtime, and inconsistent protection when fuses aren’t matched to startup currents and surge events. The RK1-class designation reflects a time-delayed, current-limiting device designed to safely interrupt fault currents while accommodating motor inrush and transient loads. Tin-plated construction with electrically isolated end caps simplifies installation in standard fuse holders, helping procurement reduce stock variety and maintenance costs.
Product Information
Extended Description
LPS-RK-400SP-TP Eaton: Eaton Bussmann series LPS-RK fuse, Low-peak fuse, 400 A, RK1, Non-indicating, Time delay, Current-limiting, 100 kAIC at 300 Vdc, 300 kAIC at 600 V, Tin-plated, Standard, 600 V, 300 Vdc
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-400SP-TP
UPC
051712556880
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
Not Applicable
Amperage Rating
400 A
Interrupt rating
100 kAIC at 300 Vdc 300 kAIC at 600 Vac
Voltage rating
600 V, 300 Vdc
Fuse type
Time delay Current-limiting
Material
Tin-plated
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Special features
Electrically isolated end cap
LPS-RK-400SP-TP~CLASS RK1 TIN PLATED
LPS-RK-400SP-TP~CLASS RK1 TIN PLATED
Bussmann series Fuseology
Eaton Specification Sheet - LPS-RK-400SP-TP
Low-peak, time-delay design reduces nuisance tripping during startup surges while protecting conductors. This translates to improved equipment uptime and lower maintenance costs in motor control centers and distribution panels. High interrupt ratings of 100 kAIC at 300 Vdc and 300 kAIC at 600 Vac provide robust protection against short-circuit events, reducing the risk of cascading faults in data centers and industrial facilities. RK1 Class, non-indicating, and electrically isolated end caps simplify installation and field replacement; standard packaging ensures compatibility with existing Bussmann series components. Tin-plated material offers corrosion resistance in harsh environments, extending fuse life in enclosures and outdoor installations. Industry-use documentation and catalogs support quick verification of specs with Eaton LPS-RK-400SP-TP datasheets, facilitating fast, reliable procurement and deployment.
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FAQs
Installers should use standard RK1 fuse holders compatible with the Bussmann LPS family. The fuse features electrically isolated end caps and standard packaging, which simplifies safe field replacement and minimizes compatibility issues with existing panel components.
This fuse is a 400 A, current-limiting, time-delay device with interrupt ratings of 100 kAIC at 300 Vdc and 300 kAIC at 600 Vac, supporting 600 V and 300 Vdc operation to protect conductors during fault events and startup surges.
Yes. The time-delay feature accommodates motor inrush while the current-limiting capability protects conductors and upstream devices from short-circuit faults, reducing unnecessary trips and improving uptime in motor control centers.
The provided data lists Class RK1 and notes Compliances as Not Applicable. For CE or other regulatory certifications, consult Eaton’s datasheet and local requirements to confirm approvals for your region and application.
The tin-plated construction and durable end-cap design aid longevity in harsh environments, reducing replacement frequency. The time-delay and current-limiting features minimize downtime from nuisance trips, lowering maintenance costs and extending panel life in high-current industrial systems.