Eaton LPN-RK-250SP Fuse - Class RK1, 300 kAIC
Part Number: LPN-RK-250SP
Quick Summary
The Eaton LPN-RK-250SP fuse provides reliable overcurrent protection for industrial motors and control circuits. Nuisance trips during motor starts and inrush events can drive costly downtime; this dual-element, time-delay design helps resist transient faults while protecting downstream equipment. The device is CE marked and RoHS compliant, with Class RK1 construction delivering precise protection ratings for both AC and DC environments; its 300 kAIC interrupt rating at 250 Vac and 100 kAIC at 250 Vdc supports safety and regulatory standards. Designed for easy field replacement and blade-end connections, it reduces maintenance costs while supporting motor control efficiency and energy management across industrial panels.
Product Information
Extended Description
LPN-RK-250SP Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 250 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-250SP
UPC
051712538527
Product Length/Depth
8.63 in
Product Height
2.36 in
Product Width
2.36 in
Product Weight
1.75 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
250 A
Interrupt rating
300 kAIC at 250 Vac 100 kAIC at 250 Vdc
Voltage rating
250 Vac, 250 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class RK1
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Quantity
1
Special features
Indicating, High in-rush current motor protection
Bussmann series Class J Low-Peak fuse 70-600A data sheet No. 1007
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Feature: Time-delay, dual-element, current-limiting LPN-RK fuse. Business Impact: Provides selective fault clearing during motor inrush, reducing downtime and extending equipment life. Application: Motor starters, conveyors, pumps, and process controllers in manufacturing environments. Feature: 250 A amperage rating with a 300 kAIC interrupt capacity at 250 Vac and 100 kAIC at 250 Vdc. Business Impact: Ensures fast and safe fault clearance for high-current events, protecting downstream devices and wiring. Application: Control panels and MCCs in heavy industry. Feature: Blade-end x blade-end connections with standard packaging. Business Impact: Simplifies installation, reduces hardware requirements, and streamlines stocking and maintenance. Application: Retrofit and new-build automation cabinets. Feature: Class RK1, time-delay, current-limiting design with non-indicating fuse indicator. Business Impact: Predictable coordination with upstream protection schemes and straightforward diagnostics. Application: Industrial electrical protection across motor control circuits.
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FAQs
The LPN-RK-250SP features blade-end x blade-end connections designed for standard panel mounting. It fits in typical Bussmann 250 A class RK1 installations, enabling straightforward replacement in motor control centers and switchgear. Ensure alignment with upstream protection devices and secure blade contacts to minimize connection resistance and heat buildup.
Key ratings include a 250 A current rating, 300 kAIC interrupt capacity at 250 VAC, and 100 kAIC at 250 VDC. The fuse supports both 250 VAC and 250 VDC environments, providing robust protection for motors, starters, and control circuits while maintaining coordination with upstream devices.
Yes. The time-delay, dual-element design offers inrush tolerance while still delivering fast fault clearance for short-circuit events. This makes it well-suited for motor-driven applications like conveyors and pumps where start-up surges are common but protection is still required.
The LPN-RK-250SP is CE marked and RoHS compliant, aligning with European safety and environmental requirements. It follows the RK1 class fuse framework, which supports regulatory harmony in many industrial automation environments.
Field-friendly blade-end design reduces installation time and downtime during replacements. The robust interrupt rating and current-limiting behavior minimize damage to wiring and equipment, which lowers maintenance costs and improves panel reliability over the lifecycle of motor control systems.