Overview
The Edison Bullet ECNR8 250V 8A RK5 fuse is a Class RK5 dual-element, time-delay fuse designed for reliable circuit protection in motor and electrical equipment applications. Each box contains 10 fuses. These cartridge-style fuses deliver excellent overload and short-circuit protection while accommodating normal motor inrush currents without nuisance trips. The ECNR8 is a standard replacement for a wide range of electrical distribution systems and motor control panels.
Key Features
- Class RK5 dual-element, time-delay design for motor overload, ground fault, and short-circuit protection
- 250V AC rating with 200 kA interrupting capacity at rated voltage
- 8-second time-delay response at 500% of rated current for improved selectivity
- Ferrule-end cartridge construction fits standard RK5 fuse holders and clips
- 10 fuses per box—convenient bulk packaging for maintenance and stock replenishment
Technical Specifications
- Ampere Rating: 8 A
- Voltage Rating: 250 VAC
- Class: RK5 (UL Class RK5)
- Fuse Type: Dual-Element, Time-Delay
- Interrupt Rating: 200 kA at 250 VAC
- Time-Delay Response: 8 seconds at 500% rated current
- Construction: Ferrule-end cartridge
- Quantity per Box: 10 fuses
- Certifications: UL Listed
Typical Applications
The ECNR8 fuse is commonly used in:
- Motor control circuits requiring time-delay response and overload protection
- Branch circuit protection in electrical panels and distribution equipment
- Industrial machinery and equipment with 8 A nameplate ratings
- HVAC systems, compressors, and other equipment with inrush current requirements
- General industrial electrical systems rated 250V or lower
Compatibility & Replacements
Compatible With
- Standard RK5 fuse holders and fuse clips rated 250V, 60 A and above
- Motor control centers (MCCs) with Class RK5 fuse provision
- Industrial electrical distribution panels and switchgear
- Equipment designed for Class RK5 dual-element fuses
- Any 250V AC circuit requiring motor-rated overload protection
Replaces / Drop-In Replacement For
- Bussmann ECNR8 (identical specification and construction)
- Littelfuse ECNR8 (equivalent Class RK5 time-delay design)
- Mersen ECNR8 (same ampere and voltage rating)
- Legacy Edison Bullet ECNR8 fuses in existing equipment
Works With
- UL Class RK5–rated electrical equipment and distribution systems
- Standard 250V, 60 Hz industrial power systems
- Machinery and motor controllers designed for Class RK5 dual-element fuses
- Building electrical codes and standards requiring time-delay circuit protection
