Eaton LPN-RK-350SPI Fuse - CE Marked Class RK1

Time-delay, dual-element protection is built into the LPN-RK-350SPI to tolerate motor inrush while still delivering fast fault clearance. This means fewer nuisance trips during startup and better protection of wiring, terminals, and soft starters. In industrial settings such as conveyors, pumps, and fans, the fuse supports reliable operation without compromising safety or performance. With a 350 A amperage rating and an interrupt rating of 300 kAIC at 250 Vac, the LPN-RK-350SPI provides decisive fault clearance for demanding loads. The device also lists 250 Vac and 250 Vdc voltage ratings, enabling use across AC and DC control circuits commonly found in motor drives, hydraulic rigs, and machine tools. This combination reduces arc energy, protects conductors, and supports safer panel designs. Class RK1 designation provides industry-standard coordination with contactors and motor starters, simplifying device selection and warranty coverage. The LPN-RK-350SPI's dual-element construction enhances endurance and selectivity, helping plants avoid complete shutdowns by isolating only the faulted branch. Installation benefits include compatibility with standard RK1 fuse holders and compact form factor, which minimizes panel space while speeding up replacement during maintenance. Certification and compliance considerations are straightforward with the CE-marked LPN-RK-350SPI within Eaton's Class RK1 family. The product can be configured with either a non-indicating body or with an indicator to simplify status monitoring during line checks. These options support audit trails and maintenance routines, reducing regulatory risk while keeping spare parts inventories lean. Physical specs reinforce reliability in crowded panels where space and heat management matter. The LPN-RK-350SPI measures 8.63 in long, 2.36 in wide, and 2.36 in high, with a weight around 1.75 lb, enabling straightforward mounting in standard RK1 enclosures. Its time-delay fuse design tolerates short surges and motor inrush without compromising protective performance, helping facilities achieve consistent protection without over-sizing circuitry. Business outcomes include reduced downtime, lower maintenance costs, and easier regulatory reporting. From an ROI perspective, selecting a CE-marked, Class RK1 protective device with robust interrupt ratings and reliable current-limiting characteristics translates to fewer outages, longer motor life, and predictable maintenance schedules across plant lines.