Eaton LPN-RK-1SP Fuse - Time-delay, Class RK1
Part Number: LPN-RK-1SP
Quick Summary
The Eaton Bussmann LPN-RK-1SP fuse provides reliable motor protection for control circuits in industrial equipment. Choosing the right fuse to withstand motor inrush and startup surges can reduce nuisance trips, improve equipment uptime, and lower maintenance costs. This Class RK1, time-delay, dual-element fuse is CE marked and offers high interrupt ratings: 100 kAIC at 125 Vdc and 300 kAIC at 250 Vac. With a compact 2 in body length and ferrule-end connections, it installs quickly in standard blocks, supports selective coordination, and minimizes spare-part costs while maximizing line reliability in harsh industrial environments.
Product Information
Extended Description
LPN-RK-1SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 1 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-1SP
UPC
051712538084
EAN
5027590064040
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
1 A
Interrupt rating
100 kAIC at 125 Vdc 300 kAIC at 250 Vac
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
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
Special features
Non-indicating, High in-rush current motor protection
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Low-Peak 250 V LPN Class RK1 time-delay fuses,1/10-60 A data sheet no. 1003
The LPN-RK-1SP uses a time-delay, dual-element, current-limiting design to tolerate normal motor inrush while still providing fast fault interruption. This translates to fewer nuisance trips and reduced downtime in motor control circuits. It is well suited for motor starters, pumps, and fans where startup surges are common. Its compact 2 inch body length with ferrule-end connections simplifies installation and panel layout. The design enables quick replacement in existing blocks and minimizes panel space, helping technicians reduce assembly time and wiring errors. This fuse features high interrupt ratings of 100 kAIC at 125 Vdc and 300 kAIC at 250 Vac, protecting downstream components during fault conditions. The time-delay characteristic supports inrush currents typical of motors, while still delivering reliable protection for drives and circuits. This is especially valuable in conveyors, mixers, and other load-driven equipment. CE marking and Class RK1 compliance provide regulatory confidence across international installations. The non-indicating status simplifies field diagnostics, and ferrule-end connections ensure robust, vibration-tolerant wiring. These features support ongoing compliance and easy maintenance in multi-site industrial operations. Key electrical ratings include 1 A amperage and 250 Vac /125 Vdc voltage ratings, with a 0.5 lb weight and standard packaging of ten per pack. The 2 inch, standard-sized fuse is a cost-efficient, readily available spare part for motor protection schemes in automation panels. It's a dependable choice for cost-conscious OEMs focusing on uptime.
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FAQs
For reliable installation, verify ferrule-end connections match your panel blocks, ensure the 2 inch body fits within the available space, and confirm the non-indicating status won’t obscure fuse condition in crowded enclosures. Use appropriate torque on ferrule terminals to prevent vibration-related looseness and to maintain consistent interruption performance in motor Start/Stop circuits.
The time-delay characteristic accommodates startup surges common to motors, reducing nuisance trips, while the dual-element construction provides robust protection against short circuits. This combination improves equipment uptime, supports selective coordination in motor starters, and helps protect downstream drives and contactors without compromising on rapid fault interruption.
Yes. Rated for 250 Vac and 125 Vdc with high interrupt ratings, this RK1 time-delay fuse is well-suited for motor protection in AC drives, conveyors, pumps, and other motor-driven equipment. Its compact ferrule-end design and 1 A rating make it a practical choice for control panels that require reliable, space-saving protective devices.
The LPN-RK-1SP carries CE marking and belongs to Class RK1, aligning with international protection standards for motor control applications. Non-indicating status simplifies diagnostics, and its standard ferrule-end construction supports robust installations in diverse markets, facilitating cross-border compliance and streamlined maintenance.
Using the LPN-RK-1SP can reduce maintenance time due to fewer nuisance trips from motor inrush, improving uptime and production throughput. Its standard 10-per-pack packaging and ferrule-end design simplify stocking and replacement, lowering spare-part inventories while delivering durable, reliable circuit protection for motor control centers.