Eaton LESRK300I Fuse - 200 kAIC High In-Rush Motor Protection
Part Number: LESRK300I
Quick Summary
Eaton Edison LESRK fuse is a time-delay, indicating fuse designed for motor protection in industrial applications. This solution helps engineers address nuisance trips that occur during motor start-up and high inrush events. While many Eaton fuses in this family are designed with industry-standard safety features, you should verify region-specific certifications such as CE, UL, and IEC alignments for your installation. For operations teams, the clear status indication simplifies maintenance planning and fault analysis, reducing downtime. The LESRK300I also supports high-current motor protection in 600 V systems, offering reliable protection while keeping line-side wiring and enclosure footprints practical for panel builders and OEMs.
Product Information
Extended Description
LESRK300I Eaton: Eaton Edison LESRK fuse, Time-delay fuse, Indicating, High in-rush current motor protection, 300 A, Dual, 200 kAIC, 1, 600 V
Product Name
Eaton Edison LESRK fuse
Catalog Number
LESRK300I
UPC
782634990611
Product Length/Depth
11.63 in
Product Height
2.36 in
Product Width
2.36 in
Product Weight
2.36 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
300 A
Interrupt rating
200 kAIC
Voltage rating
600 V
Number of elements
Dual
Quantity
1
Special features
Indicating, High in-rush current motor protection
Feature → Business Impact → Application: Time-delay operation minimizes nuisance trips during motor start-up, improving equipment uptime and reducing unnecessary wear on contactors and drives; this translates to lower maintenance costs and smoother production lines in pump and fan applications. Feature → Business Impact → Application: Indicating fuse provides real-time status visibility, enabling faster fault isolation and safer, data-driven maintenance decisions in automated manufacturing cells. Feature → Business Impact → Application: High in-rush current motor protection protects motors and drives against transient overloads, extending motor life and reducing replacement costs in conveyor and material-handling systems. Feature → Business Impact → Application: Dual-element design enhances reliability for dual-circuit protection in packaged equipment and multi-motor controls, simplifying panel layout and spare-part inventories. Feature → Business Impact → Application: 600 V rating and 300 A capacity ensure compatibility with common industrial power architectures, enabling straightforward integration with Eaton Edison lineups and OEM enclosures. Feature → Business Impact → Application: 200 kAIC interrupt rating offers robust short-circuit protection, supporting safe operation of large motors and variable-frequency drives in demanding environments. Industry insight: engineers often balance selectivity and trip protection; LESRK300I helps meet these criteria while maintaining serviceability in crowded MCCs and motor starter cabinets.
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FAQs
Install the LESRK300I in the designated fuse holder per the Eaton Edison installation guide. Verify the line-side and load-side connections match the dual-element configuration, ensure proper torque on lugs, and confirm clearance for 600 V operation. Use appropriate enclosure spacing and follow local electrical codes for safe commissioning and testing.
The LESRK300I is a time-delay (dual-element) fuse with a 300 A rating and 200 kAIC interrupt rating, designed to tolerate startup surges without nuisance trips while still protecting the circuit. This balance is ideal for motors in conveyors, pumps, and fans where short, transient overloads occur during startup.
Yes. LESRK300I is part of the Eaton Edison fuse family and is rated for 600 V systems with a 300 A amperage rating, matching common industrial motor circuits. Verify enclosure fit, busbar spacing, and upstream protection coordination to ensure seamless integration with existing Edison components.
Typical motor-protection fuses align with industry standards such as CE marking and UL/IEC listings where applicable. For the LESRK300I, confirm the exact certifications on Eaton’s official datasheet and ensure regional regulatory requirements are met in your facility’s electrical installation.
The indicating feature reduces maintenance guesswork by showing fuse status at a glance, while the time-delay characteristic minimizes unplanned outages during motor start-up. Together with high interrupt rating and compact form, this can lower downtime, extend motor life, and reduce spare-parts inventory for motor protection in MCCs and OEM equipment.