Eaton LPSRK40SPNP fuse - RK1 Time-Delay, 600V
Part Number: LPSRK40SPNP
Quick Summary
The Eaton LPSRK40SPNP fuse provides time-delay, current-limiting protection for industrial power circuits. Engineers often contend with nuisance trips during surge events; this device minimizes false trips while preserving safety margins. RoHS compliant and built with a Class RK1 footprint, it also features nickel plated caps for extended contact reliability. With 600 V and 300 Vdc voltage ratings, this fuse integrates seamlessly into modern power distribution and control panels, supporting robust protection without complicating procurement. A clear fit for panel builders and OEMs seeking dependable, standards-aligned protection, it complements the Eaton Bussmann series portfolio while offering practical installation and maintenance advantages for everyday operation.
Product Information
Extended Description
LPSRK40SPNP Eaton: Eaton Bussmann series LPS-RK fuse, Nickel plated caps, 40 A, RK1, Non-indicating, Time delay, Current-limiting, 10 sec at 500%, 100 kAIC at 300 Vdc, 300 kAIC at 600 V, Standard, 600 V, 300 Vdc
Product Name
Eaton Bussmann series LPS-RK fuse
Catalog Number
LPSRK40SPNP
UPC
051712608985
Product Length/Depth
5.5 in
Product Height
1.06 in
Product Width
1.06 in
Product Weight
2.6 lb
Warranty
Not Applicable
Compliances
RoHS Compliant
Amperage Rating
40 A
Interrupt rating
100 kAIC at 300 Vdc 300 kAIC at 600 Vac
Response time
10 sec at 500%
Voltage rating
600 V, 300 Vdc
Fuse type
Time delay Current-limiting
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Special features
Nickel plated caps
LPSRK40SPNP~LOW PEAK NI PLATED CAPS.
LPSRK40SPNP~LOW PEAK NI PLATED CAPS.
Bussmann series Fuseology
Eaton Specification Sheet - LPSRK40SPNP
Time-delay, current-limiting design provides controlled fault response, reducing nuisance tripping and protecting downstream equipment while maintaining fast response to actual faults. This translates to increased uptime, lower maintenance costs, and improved productivity in high-startup environments such as motors and drives. The 40 A rating paired with high interrupt ratings (100 kAIC at 300 Vdc and 300 kAIC at 600 Vac) enables protection in medium-sized systems without overreacting to brief surges, improving system reliability and lifecycle. RoHS compliance and nickel-plated caps deliver corrosion resistance and regulatory alignment, simplifying sourcing and long-term maintenance. The RK1 class designation and non-indicating design streamline replacement in standard fuse holders, reducing downtime during panel servicing. Standard packaging and a compact form factor enhance compatibility with existing Eaton Bussmann series installations and panel layouts.
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FAQs
The LPSRK40SPNP is a standard RK1 class fuse designed for Eaton Bussmann series holders. It uses a 5.5 inch body length and features nickel-plated caps, ensuring reliable mating and easy replacement in typical RK1 enclosures and panel assemblies.
It is rated for 40 A with interruption ratings up to 100 kAIC at 300 Vdc and 300 kAIC at 600 Vac. It provides time-delay operation with a 10 second response at 500% overload and supports voltage ratings of 600 V and 300 Vdc.
Ideal for power distribution panels, machine control cabinets, and motor drives where surge events are common. The time-delay feature reduces nuisance trips during startup, while current-limiting protects downstream components. Its 40 A rating aligns with small-to-mid-scale panels and standard RK1 holder configurations.
The LPSRK40SPNP is RoHS compliant, Class RK1, non-indicating, and features nickel plated caps to resist wear and corrosion. Packaging is Standard, and its 5.5 inch length with 1.06 inch width and height supports typical DIN-rail and panel-mount installations.
Use compatible RK1 fuse holders and verify system voltage matches 600 V/300 Vdc ratings. Ensure adequate cooling for time-delay operation, inspect nickel-plated caps for secure contact, and keep spare units from the Eaton Bussmann lineup to minimize downtime and simplify procurement during maintenance.