Overview
The Reliance Electric ECSR-50 is a Class RK5 dual-element, time-delay fuse rated for 50 amperes at 600 volts AC. It provides current-limiting protection with dual-element design, making it ideal for feeder and branch circuit protection in industrial control panels, motor starters, and distribution systems. This lot includes three units, offering spare capacity for critical applications.
Key Features
- Time-delay current-limiting with superior overload and cycling capabilities
- Ferrule-end connections with 10-second response time at 500% current
- 200 kAIC interrupting rating for enhanced fault protection
- Dual-element design for motor start-up transient tolerance
- Provides motor overload, ground fault, and short-circuit protection
- Non-indicating design with standard construction
Technical Specifications
- Voltage Rating: 600 V AC
- Current Rating: 50 A
- Fuse Class: Class RK5
- Type: Dual-element time-delay
- Response Time: 10 seconds @ 500% current
- Interrupting Rating: 200 kAIC
- End Connection: Ferrule end × ferrule end
- Diameter: 1.06 inches
- Length: 5.5 inches
- Weight Per Unit: 3.10 lbs
- Quantity: Lot of 3 fuses
Typical Applications
- Motor branch circuit and feeder protection
- Industrial control panels and distribution boards
- Commercial electrical systems with repetitive cycling loads
- Transformer protection and backup systems
- Manufacturing equipment and machinery circuits
Compatibility & Replacements
Compatible With
- Standard ferrule-type fuse holders and clips rated 600V AC
- Eaton Bussmann Class RK5 fuse applications
- Edison fuse sockets and blocks (Class RK5 sized)
- Industrial electrical distribution systems rated 600V
Replaces / Drop-In Replacement For
- Bussmann ECSR-50 (equivalent part)
- Eaton ECSR50 (equivalent part)
- Other Class RK5 50A 600V dual-element fuses with ferrule ends
Works With
- Class RK5 rated fuse holders and distribution blocks
- Standard 600V AC industrial electrical systems
- Motor starters and control circuits
- Transformer protection schemes
- UL-listed panel assemblies and enclosures
