Eaton LPN-RK-3/10SP Fuse - Class RK1 CE Marked
Part Number: LPN-RK-3/10SP
Quick Summary
LPN-RK fuse by Eaton provides time-delay, current-limiting protection for motor circuits and industrial control panels. Nuisance trips during motor startup are a common pain point in automation cabinets, and a robust protective device helps minimize downtime. This CE-marked Class RK1 design withstands 300 kAIC faults at 250 Vac and 100 kAIC at 125 Vdc, delivering reliable protection with an 8-second response at 500% surge. Its compact 2-inch length and standard packaging simplify cabinet integration, while dual-element construction delivers dependable motor protection against both short circuits and overloads. For engineers, the combination of OEM compatibility, non-indicating status, and high inrush protection translates to reduced maintenance and safer, more efficient operations.
Product Information
Extended Description
LPN-RK-3/10SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 0.3 A, non-indicating fuse, interrupting rating of 300 kA at 250 Vac and 100 kA at 125 Vdc
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-3/10SP
UPC
051712538039
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
9 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
0.3 A
Interrupt rating
300 kAIC at 250 Vac 100 kAIC at 125 Vdc
Response time
8 sec at 500%
Voltage rating
250 Vac, 125 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Quantity
10
Special features
Non-indicating, High in-rush current motor protection
Bussmann Full Line Catalog
Bussmann Full Line Catalog
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Bussmann series Fuseology
Bussmann series Low-Peak 250 V LPN Class RK1 time-delay fuses,1/10-60 A data sheet no. 1003
Feature: Time-delay, dual-element design provides sustained current during startup while quickly clamping surges during fault conditions. Business Impact: Reduces nuisance tripping and protects motor windings from harmful inrush, improving line uptime in automated equipment. Application: Ideal for AC motors and drives in packaging lines, material handling, and machine control cabinets. Feature: Current-limiting with a 0.3 A rating and high interrupt ratings of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc. Business Impact: Limits fault energy to wiring and components, preventing damage and costly downtime in power distribution and MCCs. Application: Motor starters, feeders, and critical control circuits in industrial plants. Feature: Voltage rating of 250 Vac / 125 Vdc and dual-element construction. Business Impact: Flexible use across mixed AC/DC control environments, reducing part variety and stocking needs. Application: Industrial controls, conveyors, and HVAC-related equipment. Feature: Class RK1, non-indicating fuse in standard packaging. Business Impact: Streamlined installation with widely recognized protection standards and low maintenance overhead. Application: OEM panel builds and retrofit projects using Bussmann series components. Feature: Compact footprint with 2 in length, 0.56 in height, 9 in width, and 0.5 lb weight. Business Impact: Lightweight, easy handling, and cabinet-friendly footprint that speeds installation and reduces enclosure depth. Application: Field-serviceable assemblies and tight-control panels. Feature: CE Marking and compliance alignment. Business Impact: Supports global regulatory requirements, simplifies procurement, and accelerates time-to-value for international production lines.
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FAQs
When installing the LPN-RK-3/10SP, use standard Bussmann fuse holders and accommodate its 2 inch length within a standard RK1 cabinet layout. Verify the 0.3 A rating matches the motor control circuit and ensure wiring complies with 250 Vac/125 Vdc requirements. The non-indicating design simplifies status checks, but periodic inspection of terminations is still advised for reliability.
The 0.3 A rating identifies continuous operating current capacity for the circuit protected by the fuse. As a time-delay, current-limiting device, it tolerates start-up inrush while limiting peak fault current, reducing nuisance trips. This helps maintain drive availability and protects conductors, especially in motors with high inrush characteristics typical in automation lines.
Yes. The LPN-RK-3/10SP is designed for high inrush protection, featuring dual-element construction and a time-delay profile that tolerates startup surges without compromising fault protection. Its 300 kAIC fault rating at 250 Vac provides robust protection for motor control centers in HVAC and conveyor applications while maintaining safety margins.
This fuse is CE marked and classified as Class RK1, aligning with global electrical protection standards. While UL/other certifications are not listed in the provided data, CE marking confirms compliance with European safety requirements, supporting procurement for multi-region projects and integration with Bussmann series data sheets.
The LPN-RK-3/10SP reduces downtime by tolerating motor inrush while delivering reliable short-circuit protection with high interrupt ratings. Its standard packaging, non-indicating design, and compatibility with Eaton Bussmann data simplify stocking and replacement procedures, leading to lower maintenance costs and faster service in complex control cabinets.