Overview
The Reliance ECSR7 is a dual-element, time-delay fuse designed for circuit protection in industrial and commercial applications. Part of the Edison ECSR series (now manufactured by Eaton), this Reliance ECSR7 fuse offers superior overload and cycling capabilities with ferrule-end terminations for secure installation in standard RK5 fuse holders.
Key Features
- 7 Ampere current rating at 600V AC
- Dual-element, time-delay design reduces nuisance trips on motor startup surges
- Class RK5 current-limiting construction protects downstream equipment
- 200 kAIC interrupting rating for 600V systems
- Ferrule-end terminals for secure connection
- UL and CSA listed for safety compliance
Technical Specifications
| Current Rating | 7 Ampere |
| Voltage Rating | 600V AC |
| Fuse Class | RK5 |
| Type | Dual-Element, Time-Delay |
| Interrupting Capacity | 200 kAIC at 600V |
| Body Material | Ferrule End x Ferrule End |
| Length | 5 inches |
| Diameter | 0.81 inch |
| Response Time | 10 seconds at 500% rated current |
| Certifications | UL, CSA C22.2, CE Approved |
| Series | Edison ECSR (Eaton Bussmann) |
Typical Applications
The Reliance ECSR7 is commonly used in:
- Industrial motor control circuits and branch circuits (up to 7A loads)
- Commercial HVAC systems requiring time-delay fuse protection
- Machine tool control panels and automation systems
- General-purpose distribution systems rated 600V and below
- Equipment retrofit and maintenance where RK5 fuse holders are present
Compatibility & Replacements
Compatible With
- Standard RK5 fuse holders and clips
- 600V single-phase and three-phase AC systems
- Industrial control panels with ferrule-terminal fuse blocks
- Motors and motor control circuits rated for Class RK5 fuse protection
- Equipment designed for dual-element, time-delay fuse technology
Replaces / Drop-In Replacement For
- Previous Reliance ECSR7 inventory
- Edison ECSR7 fuses from earlier production runs
- Eaton Bussmann ECSR7 fuses (same manufacturer, same ratings and performance)
- Legacy RK5 7A fuses in compatible applications
Works With
- RK5-class fuse installation systems and fuse pullers
- Standard 600V distribution equipment with ferrule-terminal fuse blocks
- Time-delay fuse coordination and motor protection schemes
- Industrial electrical maintenance and troubleshooting tools
