Overview
The Bullet ECNR2 is a time-delay, current-limiting fuse manufactured to Eaton Edison specifications. Rated at 2A, 250V AC (125V DC), this dual-element fuse is designed for overcurrent protection in AC power distribution systems. The ECNR2 is a Class RK5 cartridge fuse with ferrule-end connections, suitable for motor circuits, transformer protection, and general branch circuit applications where inductive or non-inductive loads are present.
Key Features
- Dual-element, time-delay design prevents nuisance trips on motor inrush
- Class RK5 current-limiting provides superior protection against short circuits and overloads
- 8-second response at 500% rated current per UL standards
- Ferrule-end construction for reliable cartridge holder installation
- 200 kA interrupt rating at 250V AC, 20 kA at 125V DC
- UL listed and industry-standard for motors, transformers, and lighting loads
Technical Specifications
- Current Rating: 2A
- Voltage Rating: 250V AC, 125V DC
- Fuse Class: RK5 (Current-Limiting)
- Type: Dual-Element Time-Delay
- Interrupt Rating: 200 kAIC at 250V AC; 20 kAIC at 125V DC
- Response Time: 8 seconds at 500% rated current
- End Configuration: Ferrule x Ferrule
- Quantity per Box: 3 fuses
- Certifications: UL Listed, CSA Approved
Typical Applications
The Bullet ECNR2 is recommended for AC power distribution system mains, feeders, and branch circuits. Common applications include:
- Motor branch circuits and disconnect protection
- Transformer primary and secondary windings
- Lighting and heating loads (non-inductive)
- Industrial control panels and switchgear
- Commercial electrical distribution up to 200,000 RMS symmetrical amperes available fault current
Compatibility & Replacements
Compatible With
- Standard cartridge fuse holders (ferrule-end design, 2A rating)
- AC power distribution systems rated 250V or below
- Motor starter and disconnect switches
- Industrial control panels and switchboards
Replaces / Drop-In Replacement For
- Eaton/Bussmann ECNR2 (original Edison design)
- Other 2A 250V Class RK5 time-delay cartridge fuses with ferrule ends
- Verify exact fuse holder compatibility before ordering
Works With
- Any standard AC electrical system using 2A, 250V cartridge fuse holders
- Motor control circuits, soft starters, and VFD input protection
- Industrial and commercial distribution systems
