Overview
The Bussmann Bullet ECNR3 is a 3-ampere, 250-volt Edison base fuse engineered for AC power distribution systems. This time delay fuse features an RK5 mounting class and delivers robust overcurrent protection for industrial and commercial electrical applications. Supplied in a box of 10 units, the ECNR3 combines proven Bussmann/Bullet reliability with straightforward drop-in compatibility for replacement or upgrade scenarios.
Key Features
- Time delay (slow-blow) design protects motors, transformers, and other inductive loads from nuisance trips
- RK5 Edison base connection for easy installation in compatible fuse holders
- 200,000 RMS symmetrical amperes interrupting rating
- 250V AC rated for standard North American electrical systems
- CSA/UL approved for safety and code compliance
- Bulk box of 10 fuses reduces inventory management
Technical Specifications
- Voltage Rating: 250V AC
- Current Rating: 3A (3 amperes)
- Fuse Type: Time Delay (Dual Element)
- Base Type: Edison RK5
- Interrupting Rating: 200,000 RMS symmetrical amperes
- Applicable Standards: UL, CSA
- Package Quantity: 10 fuses per box
- Manufacturer: Bussmann (Bullet brand)
Typical Applications
The ECNR3 is suited for AC power distribution system mains, feeders, and branch circuits. It provides protection for motors, transformers, and other inductive equipment that benefits from time delay coordination. Common installations include industrial control panels, motor control centers, and commercial electrical distribution systems where nuisance tripping from inrush currents must be avoided.
Compatibility & Replacements
Compatible With
- RK5 Edison base fuse holders
- Standard North American 250V AC distribution systems
- Motor control centers and industrial panels
- Commercial electrical service panels rated for 250V operation
Replaces / Drop-In Replacement For
- Existing ECNR3 units in same gauge and base class
- Equivalent RK5 Edison 3A 250V time delay fuses from competing manufacturers
- Verify compatibility with your system integrator before ordering
Works With
- RK5 class Edison base fuse holders and sockets
- Standard 250V AC electrical panels and distribution equipment
- Industrial automation control systems requiring time delay protection
- Motor protection circuits and inductive load applications
