Eaton LPN-RK-225SPI fuse - Class RK1, 300 kAIC at 250Vac

Part Number: LPN-RK-225SPI
Manufacturer
Eaton
Part number
LPN-RK-225SPI

Quick Summary

The Eaton LPN-RK-225SPI fuse provides time-delay protection for motor circuits and power distribution in industrial control panels. In many installations, inrush and motor-start surges trigger nuisance trips, causing unplanned downtime and maintenance costs. CE Marked and aligned with the Class RK1 family, this device offers predictable protection with a dual-element design and high interrupt capability for demanding environments. Designed for easy integration, it supports blade-end connections and standard packaging, helping minimize install time and maintain spare-fuse inventories. When paired with Eaton Bussmann series protection components, it supports reliable, long-term protection while supporting efficiency and total cost of ownership goals.

Product Information

Extended Description

LPN-RK-225SPI Eaton: Eaton Bussmann Series Class RK1 fuse, LPN-RK, time-delay, dual-element, current limiting fuse, 225 A, indicating fuse, interrupting rating of 300 kA at 250 Vac
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-225SPI
UPC
051712626798
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
Amperage Rating
225 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 With Indicator
Quantity
1
Special features
Non-indicating, High in-rush current motor protection
Feature → Business Impact → Application: Time-delay, dual-element design provides robust short-circuit protection while tolerating startup surges, reducing nuisance trips in motor-driven equipment and conveyors, enabling higher line uptime in manufacturing floors. Application: Use in motor control centers and power distribution panels where inrush currents are common and reliable interrupting capacity is required. Feature → Business Impact → Application: 225 A amperage rating aligns protection with moderate-to-heavy motor loads, improving protection coordination and minimizing device replacement costs in the long run. Application: Suitable for HVAC drives, packaging machines, and material handling systems that demand dependable overcurrent protection without premature tripping. Feature → Business Impact → Application: 300 kAIC interrupt rating at 250Vac delivers strong fault withstand capability, increasing system reliability and ease of compliance during audits. Application: Critical protection in control cabinets, distribution boards, and industrial machinery. Feature → Business Impact → Application: Blade-end x blade-end connections enable quick, tool-free installation with standard fuse blocks, reducing maintenance time. Application: Retrofit projects and new panel builds where RK1 fuse compatibility accelerates deployment. Feature → Business Impact → Application: CE Marked compliance ensures European safety alignment, while the RK1 class designation supports consistent protection schemes across platforms. Application: Global deployments with standardized protection strategies. Additional advantages include visible indicator options and standard packaging that simplify inventory management and field service, delivering lower total cost of ownership.

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FAQs

LPN-RK-225SPI uses blade end x blade end connections, designed for compatibility with standard RK1 blade-style fuse blocks and Eaton Bussmann LPN family housings. This allows quick field installation and straightforward replacement without specialized adapters, reducing panel downtime and inventory complexity.
The fuse is rated for 225 A with an interrupt rating of 300 kAIC at 250 Vac and supports both 250 Vac and 250 Vdc voltage ratings. It is a time-delay, dual-element, current-limiting device designed to handle motor startup surges while protecting downstream circuitry from faults.
Yes. The time-delay, dual-element construction is specifically intended to withstand startup inrush and short-term overloads, reducing nuisance trips while maintaining short-circuit protection. This makes it well suited for motors, conveyors, and other machinery that experience brief peak currents.
The LPN-RK-225SPI is CE Marked, aligning with European safety standards. It also belongs to the Class RK1 family, which denotes a recognized fuse design class used across many industrial protection schemes, aiding standardization and compliance in panel builds.
Key benefits include standard packaging and blade-end connections that simplify replacement, an 8.63 in length with compact dimensions for panel fit, and a clearly defined 225 A rating with high interrupt capability. The option for a fuse indicator (with or without indicator) can improve maintenance visibility, reducing downtime during inspections.