Overview
The Edison LESRK 4.5A fuse is a Class RK1 dual-element, time-delay cartridge fuse rated for 600V AC service. Manufactured by Eaton Edison, the LESRK series is designed specifically for motor branch circuits and load centers where temporary inrush current must be tolerated without nuisance blowing. The LESRK 4.5A provides current-limiting protection with a 200 kAIC (kiloampere) interrupting rating, making it suitable for industrial machinery, HVAC systems, and general distribution panels.
Key Features
- Dual-element, time-delay design tolerates motor inrush without false trips
- 600V AC rated with 200 kAIC interrupting capacity
- Class RK1 current-limiting fuse—provides selective coordination with branch circuit breakers
- UL 248-12 and CSA C22.2 No. 248.12 certified
- Non-indicating fuse body (no indicating pop or window)
Technical Specifications
- Ampere Rating: 4.5A
- Voltage Rating: 600V AC
- Interrupting Rating: 200 kAIC RMS Symmetrical
- Fuse Class: RK1
- Fuse Type: Dual-element, time-delay
- Response Time: Time-delay (slow-blow) for motor inrush tolerance
- Operating Frequency: 50/60 Hz
- Certifications: UL, cUL, CE
Typical Applications
The Edison LESRK 4.5A is commonly used in:
- Motor branch circuits and motor starters
- Industrial machine tool control circuits
- HVAC equipment protection
- Machine control panels and load centers
- Equipment rated 4–6A requiring time-delay protection
Compatibility & Replacements
Compatible With
- Standard Class RK1 fuse holders and cartridge blocks
- Motor starter overload relay circuits (as branch protection)
- Industrial control panels rated 600V AC
- Eaton/Cutler-Hammer load centers and enclosures
- Single-phase and three-phase motor circuits
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or original equipment specification before substituting. Other Class RK1 manufacturers include Bussmann, Mersen, Littelfuse, and Gould; however, only exact part-number matches should be considered direct replacements.
Works With
- Class RK1 fuse holders and clips
- 600V AC motor control centers
- Industrial branch circuit distribution equipment
- Standard electrical panel and enclosure installations per NEC Article 430
