Eaton LPS-RK-250SP-TP Fuse - Class RK1 Time-Delay, 100 kAIC
Part Number: LPS-RK-250SP-TP
Quick Summary
The Eaton LPS-RK-250SP-TP fuse provides current-limiting protection for industrial power distribution and control panels. This time-delay, Class RK1 device helps avoid nuisance outages by accommodating temporary inrush currents while safeguarding connected equipment. Designed for reliability in demanding environments, it features tin-plated terminals and an electrically isolated end cap to simplify replacement and reduce corrosion risks. The fuse supports high interrupt ratings up to 100 kAIC at 300 Vdc and 300 kAIC at 600 Vac, aligning with common industrial protection standards. By combining robust protection with compact form and standard packaging, it reduces maintenance downtime and simplifies procurement for electrical protection and circuit control applications.
Product Information
Extended Description
LPS-RK-250SP-TP Eaton: Eaton Bussmann series LPS-RK fuse, Low-peak fuse, 250 A, Class 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-250SP-TP
UPC
051712752480
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
250 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-250SP-TP~CLASS RK1 FUSE TIN PLATED
LPS-RK-250SP-TP~CLASS RK1 FUSE TIN PLATED
Bussmann series Fuseology
Eaton Specification Sheet - LPS-RK-250SP-TP
Feature: Class RK1 designation provides standardized protection class for fast discrimination of circuit faults. Business Impact: Simplifies engineering coordination and enables consistent replacement parts across facilities, reducing spare-part SKUs and procurement lead times. Application: Panel boards and motor control centers benefit from known performance and easy stocking. Feature: Time-delay, current-limiting fuse design, enables tolerance of inrush while still suppressing damaging short circuits. Business Impact: Improves uptime by preventing unnecessary trips during startup and load surges, lowering unplanned outages and inspection overhead. Application: AC motor feeders and power distribution circuits in manufacturing lines. Feature: 250 A amperage rating with 600 V and 300 Vdc voltage ratings. Business Impact: Delivers scalable protection for mixed AC/DC networks without over-sizing or rework, enhancing design flexibility. Application: Heavy equipment, control panels, and process lines in industrial facilities. Feature: Tin-plated material and standard packaging with non-indicating indicator. Business Impact: Enhances contact reliability and corrosion resistance in harsh environments, while simplifying replacement logistics. Application: High-vibration installations and outdoor-rated enclosures. Feature: Electrically isolated end cap and Bussmann series compatibility. Business Impact: Safer installation and straightforward retrofits within existing Bussmann catalogs, reducing labor and risk. Application: Retrofit projects and new builds using standard Bussmann fuse components.
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FAQs
Begin by verifying circuit ratings (250 A, 600 V) and disconnecting power. Remove the existing fuse, inspect end caps for corrosion, and insert the LPS-RK-250SP-TP with tin-plated contacts into the bus and fuse holder. Ensure the end caps are electrically isolated as noted in the product features, re-energize the circuit and test functionality with appropriate protection settings.
The fuse is rated for 250 A with voltage ratings of 600 V AC and 300 V DC. It provides 100 kAIC interrupt capability at 300 Vdc and 300 kAIC at 600 Vac, delivering strong fault-clearing performance while tolerating inrush in time-delay operation. These specs support protection across mixed AC/DC panels and motor feeders.
Yes. The device is designed for both AC and DC protection within industrial environments. Its time-delay characteristic accommodates motor inrush, while current-limiting behavior helps prevent equipment damage during short-circuit events. When selecting, confirm voltage class and interrupt rating align with your DC feeders and AC distribution, ensuring compatibility with your panel design.
The fuse carries the Class RK1 designation, aligning with Bussmann series protection standards for reliable replacement and predictable performance in industrial protection schemes. While product data may not specify CE or IP ratings, Class RK1 certification is a key differentiator for selecting compatible fuses in control panels and distribution networks.
The tin-plated construction and electrically isolated end caps enhance durability in harsh environments, reducing maintenance frequency and replacement costs. Time-delay operation minimizes nuisance trips during startup, improving overall uptime and productivity. For ROI, consider reduced downtime, lower spare-part inventory, and compatibility with existing Bussmann catalogs to streamline procurement.