Eaton LPS-RK-350SP-TP Fuse - Class RK1, Time Delay
Part Number: LPS-RK-350SP-TP
Quick Summary
The Eaton LPS-RK-350SP-TP fuse provides reliable current-limiting protection for large electrical switchboards and motor control centers. Engineers often confront downtime and costly repairs due to mismatched protection devices. The RK1 class fuse features time-delay, current-limiting operation with tin-plated end caps for durable, electrically isolated connections. Note that CE, SIL, or IP certifications can vary by region—verify the Eaton datasheet for your location. Used in large switchboards and motor control centers, it helps reduce downtime and improve panel reliability. By delivering robust protection for demanding industrial environments, it aligns with key performance goals for uptime, safety, and efficiency.
Product Information
Extended Description
LPS-RK-350SP-TP Eaton: Eaton Bussmann LPS-RK fuse, Low-peak fuse, Large distribution switchboards, Power panelboards, Motor control centers, 350 A, RK1, Non-indicating, Time delay, Current-limiting, 100 kAIC Vdc, 300 kAIC at 600 V, Tin-plated, 600 V, 300 Vdc
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPS-RK-350SP-TP
UPC
051712556873
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
350 A
Interrupt rating
100 kAIC Vdc 300 kAIC at 600 Vac
Voltage rating
600 V, 300 Vdc
Fuse type
Time delay Current-limiting
Material
Tin-plated
Class
Class RK1
Fuse indicator
Non-indicating
Special features
Electrically isolated end cap
LPS-RK-350SP-TP~CLASS RK1 TIN PLATED
LPS-RK-350SP-TP~CLASS RK1 TIN PLATED
Bussmann series Fuseology
Eaton Specification Sheet - LPS-RK-350SP-TP
Time-delay, current-limiting fuse design offers selective fault clearing and arc-energy reduction. This means fewer collateral trips and less damage to feeders, improving overall equipment reliability. It’s especially valuable in motor control centers and large distribution switchboards where motors create high inrush currents. Tin-plated end caps with electrically isolated ends improve wiring durability and safety. The result is lower contact resistance, reduced corrosion risk, and safer maintenance in crowded panels. This feature supports quick field servicing and safer commissioning in power panelboards and switchgear assemblies. High interrupt ratings of 100 kAIC at Vdc and 300 kAIC at 600 Vac provide robust fault current handling. The outcome is enhanced protection for feeders and downstream devices, decreasing the likelihood of cascading failures. This is critical in industrial facilities with high fault current potential and dense bus arrangements. Class RK1 designation aligns with standard protection schemes used in Bussmann-series products. It simplifies specification, cross-referencing in Bills of Materials, and panel design workflows. The convenience improves procurement accuracy and reduces engineering time during panel upgrades or new builds in manufacturing lines. Compact 11.63-inch length with a 2.36-by-2.36-inch footprint and 4.6 lb weight enables straightforward installation in limited-space switchgear and motor-control centers. The electrolytically isolated end caps support safer connections, while the option for 600 V and 300 Vdc ratings offers flexible integration into mixed-voltage systems across plants. Compatibility and installation advantages include a standard footprint and compatible 600 V and 300 Vdc ratings that align with common industrial panels. The 11.63 in length and 4.6 lb mass ease retrofits in crowded switchgear, while tin-plated construction and electrically isolated end caps simplify wiring and reduce installation time. For procurement, Eaton provides catalogs and datasheets to support BOM accuracy. Business outcomes include improved uptime, reduced spare-part costs, and safer, more efficient maintenance in manufacturing and process facilities.
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FAQs
The LPS-RK-350SP-TP is designed for large distribution switchboards, power panelboards, and motor control centers. It supports 600 V and 300 Vdc systems, with a 350 A rating and a 100 kAIC Vdc / 300 kAIC at 600 Vac interrupt rating. Its compact 11.63 in length and tin-plated, electrically isolated end caps ease installation in dense panels and retrofit projects.
This fuse provides an interrupt rating of 100 kAIC at Vdc and 300 kAIC at 600 Vac, with a voltage rating of 600 V and 300 Vdc. These ratings support robust fault handling in high-demand industrial installations, enabling reliable protection for feeders and downstream equipment during short-circuit events.
Yes. The LPS-RK-350SP-TP combines time-delay operation with current-limiting protection, making it well-suited for motor control centers and large distribution switchboards where inrush currents occur and selective coordination is critical. Its RK1 class, tin-plated ends, and non-indicating design offer dependable protection with straightforward integration into existing panel architectures.
Compliances for this product are listed as Not Applicable in the data provided. Regional certifications such as CE, SIL, or IP can vary by market. Always verify approvals in the official Eaton datasheet and local regulatory requirements to confirm availability and applicability for your installation’s location.
The LPS-RK-350SP-TP reduces downtime through reliable time-delay protection and high interrupt ratings, protecting feeders and power circuits from faults. Its electrically isolated end caps improve safety during maintenance, while standardization with Bussmann-series parts simplifies BOM management, procurement, and future panel upgrades, delivering measurable cost savings and faster return on investment.