Eaton LPS-RK-3SP Fuse - Class RK1, CE Marked, 600 Vac
Part Number: LPS-RK-3SP
Quick Summary
The Eaton LPS-RK-3SP fuse provides time-delay, current-limiting protection for industrial circuits. Engineers often struggle with fuses that nuisance-trip during inrush or fail to clear faults promptly, causing costly downtime. This device is CE marked and belongs to the Class RK1 family, aligning with common protection schemes across industrial panels. Ferrule-end connections simplify field installation, while the dual-element design delivers reliable operation under short-circuit and surge conditions. With an interrupt rating up to 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc, it supports compact panel design while enhancing maintenance efficiency and overall system reliability.
Product Information
Extended Description
LPS-RK-3SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPS-RK, time-delay, dual-element, current limiting fuse, 3 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-3SP
UPC
051712548182
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
1.06 in
Product Weight
1.6 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
3 A
Interrupt rating
300 kAIC at 600 Vac 100 kAIC at 300 Vdc
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
Special features
Electrically isolated end cap
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
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 that tolerates short surges while delivering rapid fault clearance. Business Impact → Reduces nuisance trips and downtime, extending equipment life and lowering maintenance costs. Application → Ideal for control panels, motor drives, and distribution blocks in demanding industrial environments. This combination provides dependable protection without compromising startup performance. Feature → 3 A amperage rating with 600 Vac and 300 Vdc voltage capabilities. Business Impact → Enables safe protection across multiple supply scenarios while maintaining selectivity in compact I/O enclosures. Application → Suitable for low-voltage branch circuits in panelboards and machine control centers. Feature → 300 kAIC interrupt rating at 600 Vac and 100 kAIC at 300 Vdc. Business Impact → Safe fault clearing for high-energy faults reduces exposure and downstream damage. Application → Critical for MCCs and power distribution where large fault currents are expected. Feature → Ferrule-end x ferrule-end connections with non-indicating design and electrically isolated end caps. Business Impact → Simplifies installation, reduces miswiring risk, and eases maintenance access. Application → Preferred for modular, field-replaceable protection in standardized racks. Feature → Class RK1 compatibility and CE Marking. Business Impact → Ensures compliance with mainstream industrial protection schemes, enabling straightforward approvals and cross-brand integration. Application → Fits common industrial control architectures while supporting RoHS-like diligence through CE compliance.
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FAQs
The LPS-RK-3SP is a Class RK1 time-delay, dual-element, current-limiting fuse that aligns with standard protection schemes used in industrial control panels. Its ferrule-end connections and non-indicating design simplify replacement in existing racks, while CE marking ensures conformity with mainstream safety requirements. This compatibility minimizes engineering changes during retrofits and supports seamless integration with protective relays and upstream disconnects.
The fuse is rated for 3 A, with voltage ratings of 600 Vac and 300 Vdc and an interrupt rating of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. Use 600 Vac for typical AC power circuits in industrial environments and 300 Vdc for DC bus or drive applications. Its 10-second response at 500% contributes to reliable protection during short-term overcurrents.
Yes. The LPS-RK-3SP’s time-delay, dual-element design is specifically intended to tolerate inrush currents common with motors, while still providing fast fault clearance. Its 3 A rating and high interrupt capability help protect downstream electronics without nuisance trips, supporting smoother motor startups and reduced downtime in panel assemblies and motor control centers.
The fuse uses ferrule-end to ferrule-end connections, with electrically isolated end caps for safe servicing. The unit is a dual-element, time-delay device and is packaged standard for easy drop-in replacement. Dimensions—5 in length, 1.06 in width, 0.81 in height—facilitate straightforward mounting in standard fuse blocks and panel rails.
The LPS-RK-3SP delivers measurable value through reduced downtime from minimized nuisance trips, longer service intervals thanks to robust current limiting, and dependable fault clearance at high currents. Its CE Marked Class RK1 compatibility streamlines approvals, while ferrule-end construction and safe end-cap isolation simplify maintenance and reduce field labor costs during replacements.