Overview
The Edison ECSR40 Bullet fuse is a Class RK5 dual element time delay cartridge fuse designed for AC power distribution systems. Rated at 40A and 600VAC with a 200kA (RMS symmetrical) interrupting rating, the Edison ECSR40 delivers economical overcurrent protection for circuits with inductive loads such as motors and transformers. Its dual element construction and time delay characteristics allow sizing closer to actual running amperage, reducing unnecessary nuisance trips while providing superior fault protection.
Key Features
- Dual element design with 10 second time delay at 500% of rated current
- 200kA RMS symmetrical short circuit interrupting rating
- Class RK5 current-limiting fuse for moderate short circuit protection
- Suitable for motor overload, ground fault, and short circuit protection
- Ferrule end terminals compatible with standard fuse holders
- UL Listed and CSA Certified for safety compliance
Technical Specifications
- Rated Current: 40 Amperes
- Voltage Rating: 600VAC
- Interrupting Rating: 200 kA (RMS Symmetrical)
- Fuse Class: RK5
- Time Delay: Dual Element (10 seconds at 500%)
- Body Diameter: 1.06 inches (27 mm)
- Body Length: 5.5 inches (140 mm)
- Terminal Type: Ferrule End x Ferrule End
- Construction: Fiberglass cartridge body
- Certifications: UL 248-12, CSA C22.2 No. 248.12
- Manufacturer: Edison (Eaton / Cooper Bussmann)
Typical Applications
The Edison ECSR40 is recommended for AC power distribution system mains, feeders, and branch circuits. It excels in applications with inductive loads such as:
- Motor branch circuits and feeders
- Transformer circuits
- Distribution panels and switchboards
- Lighting and heating circuits with transient surge currents
- Industrial machinery and equipment where reliable backup protection is essential
Compatibility & Replacements
Compatible With
- Standard RK5 fuse holders rated for 600VAC service
- AC power distribution systems (single and three-phase)
- Motor control centers and disconnect switches
- Panelboards and switchboards accepting cartridge fuses
- Industrial control systems and machinery
Replaces / Drop-In Replacement For
- Similar Class RK5 40A fuses from other manufacturers
- Edison/Bussmann ECSR 40 amp variants
- Other 600VAC 40A dual element fuses meeting Class RK5 specifications
Works With
- All standard 600VAC fuse holders and clips rated for Class RK5 cartridge fuses
- Edison/Bussmann fuse blocks and accessories
- Power distribution and protection systems using Class RK5 fuses
- Equipment designed for ferrule-end fuse cartridges
