Eaton LPN-RK-125SP-TP fuse - Class RK1 125A 100kAIC
Part Number: LPN-RK-125SP-TP
Quick Summary
The Eaton LPN-RK-125SP-TP fuse protects power circuits in motor drives and control panels with time-delay, current-limiting performance. Engineers often battle nuisance outages from inrush currents; this fuse helps separate normal startup surges from true faults. RoHS compliant and Class RK1 certified, with a 125 A rating and high interrupt capability—100 kAIC at 250 Vdc (300 kAIC at 250 Vac)—it offers robust protection for demanding industrial controls. Using this fuse translates to reduced downtime, simpler spares management, and safer, compliant motor protection in control panels and drive cabinets. In addition, its tin-plated contacts resist corrosion, maintaining dependable performance in challenging environments.
Product Information
Extended Description
LPN-RK-125SP-TP Eaton: Eaton Bussmann series LPN-RK fuse, Low-peak fuse, 125 A, RK1, Non-indicating, Blade end x blade end, Time delay, Current-limiting, 100 kAIC at 250 Vdc, 300 kAIC at 250 V, Tin-plated, Standard
Product Name
Eaton Bussmann series LPN-RK fuse
Catalog Number
LPN-RK-125SP-TP
UPC
051712752343
Product Length/Depth
7.13 in
Product Height
1.61 in
Product Width
1.16 in
Product Weight
0.69 lb
Warranty
Not Applicable
Compliances
RoHS Compliant
Amperage Rating
125 A
Interrupt rating
100 kAIC at 250 Vdc 300 kAIC at 250 Vac
Voltage rating
250 Vac, 250 Vdc
Fuse type
Time delay Current-limiting
Material
Tin-plated
Packaging type
Standard
Class
Class RK1
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Special features
Non-indicating, High in-rush current motor protection
LPN-RK-125SP-TP~CLASS RK1 FUSE TIN PLATED
LPN-RK-125SP-TP~CLASS RK1 FUSE TIN PLATED
Bussmann series Fuseology
Eaton Specification Sheet - LPN-RK-125SP-TP
Time-delay, current-limiting design minimizes nuisance trips during motor start-up, delivering smoother equipment operation and less downtime. For systems like conveyors and machine tools, this translates to higher line uptime and reduced maintenance costs. Class RK1 classification and blade-end connections enable quick, reliable installation in standard RK1 fuse holders. This compatibility simplifies retrofits and stock management by aligning with Eaton Bussmann series fuses across panels. 125 A amperage rating matches typical protection needs for mid-sized drives, while 250 V ratings support both AC and DC circuits. The current-limiting feature constrains fault currents, protecting wiring and downstream devices. High interrupt ratings of 100 kAIC at 250 Vdc and 300 kAIC at 250 Vac provide robust protection against short circuits, reducing the risk of cascading damage and enabling safer panel operation. Tin-plated construction improves corrosion resistance and ensures reliable contact integrity in harsh environments, extending fuse life in manufacturing settings. RoHS compliance supports regulatory conformance and environmental responsibility in modern facilities. Physical details such as blade-end to blade-end connections and standard packaging streamline replacement and stock planning for service teams.
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FAQs
To guarantee proper compatibility, verify blade-end x blade-end connections match your fuse holders and ensure panel clearance accommodates a 7.13 in length. Mount the fuse in a standard RK1 holder, maintain proper cooling, and follow Eaton guidance for safe insertion and removal to minimize arcing and contact wear.
Key specs include 125 A amperage rating, 100 kAIC at 250 Vdc and 300 kAIC at 250 Vac interrupt ratings, a time-delay and current-limiting fuse type, and blade-end connections. These parameters deliver robust fault interruption while tolerating motor startup surges, reducing nuisance trips and preserving wiring and downstream components.
Yes. The time-delay, current-limiting design accommodates normal inrush currents typical of motors in CNC machines and conveyors, while the high interrupt ratings cap fault currents. Pair it with RK1-class panels and standard Bussmann series parts to ensure reliable protection during startup without nuisance tripping.
This fuse is RoHS compliant and classified as Class RK1, with blade-end connections for easy replacement. While UL/CE listings aren’t specified in the data provided, RoHS compliance supports environmental and regulatory requirements in many regions, and RK1 classification aligns with common industry fuse standards.
Expect improved uptime due to reduced nuisance trips during motor start-up, extended panel life from robust fault interruption, and streamlined spare management via RK1 compatibility. The tin-plated contacts enhance reliability in harsh environments, while RoHS compliance supports broader regulatory alignment, lowering total cost of ownership over the panel’s life.