Overview
The ECNR10 250V 10A RK5 fuse is a professional-grade, dual-element time-delay fuse designed for reliable overcurrent protection in industrial and commercial AC power distribution systems. Manufactured by Eaton Edison, this Class RK5 fuse combines superior overload and cycling capabilities with current-limiting performance.
Key Features
- Dual-Element Design: Minimum industry standard time-delay of 10 seconds at 5 times the fuse rating (8 seconds minimum for 250V, 30A and less), allowing fuses to accommodate motor inrush currents and reduce unnecessary nuisance trips
- Time-Delay Technology: Recommended for AC power distribution system mains, feeders and branch circuits having inductive loads (motors, transformers) or non-inductive loads (lighting, heating)
- Compact Form Factor: 2-inch fuses with ferrule-end construction for standard RK5 fuse holders
- High Interrupt Rating: 200 kAIC at 250V, with non-indicating design
- Industry Standard: Most popular fuses used in the industry, especially for motors and transformers
Technical Specifications
- Current Rating: 10 A
- Voltage Rating: 250V AC, 125V DC
- Fuse Class: RK5 (current-limiting)
- Type: Dual-element, time-delay
- Interrupt Rating: 200 kAIC at 250V AC
- Time-Delay: 8 seconds at 500% load
- Body Style: Cylindrical with ferrule ends
- Dimensions: 2 in. length × 9/16 in. diameter
- Quantity per Box: 10 units
- Certifications: UL, CE, CSA
Typical Applications
These fuses are recommended for AC power distribution systems with inductive loads like motors and transformers, where their time-delay characteristics allow sizing closer to running ampacity while providing improved overcurrent protection and reducing unnecessary fuse openings. Common applications include HVAC systems, electrical panels, branch circuits, feeder circuits, and equipment protection for industrial machinery.
Compatibility & Replacements
Compatible With
- RK5 rejection-type fuse holders and blocks
- Standard electrical panels rated for Class RK5 fuses
- AC distribution systems up to 200 kA interrupt rating
- Equipment designed for 250V AC or 125V DC circuits
Replaces / Drop-In Replacement For
- Previous Eaton Edison ECNR10 production runs
- Verify compatibility with your original equipment documentation before ordering
Works With
- Bussmann FRN-R equivalent series
- Littelfuse FLNR series fuses
- Mersen TR-R series fuses
- Standard R250 fuse block series
