Overview
The FA2H50 5.5kV 50A NX fuse is a current-limiting indoor clip-style fuse manufactured by Cooper Power Systems under the McGraw Edison brand. Built for medium-voltage distribution applications, this fuse delivers dependable overcurrent protection in industrial and commercial electrical systems. With its proven design and robust construction, the FA2H50 serves as a critical protection device in substations, motor circuits, and distribution equipment rated 5.5 kilovolts and below.
Key Features
- Current-Limiting Design: Restricts fault current to lower levels, reducing thermal and mechanical stress on connected equipment
- 50 kA Interrupt Rating: Handles high-fault-current applications safely and reliably
- NX Clip-Style Mounting: Standardized indoor clip mount (code 4) for drop-in replacement in existing fuse holders
- Distribution Class C Rating: Optimized for utility distribution and industrial circuits
- 2.15-Inch Diameter: Industry-standard form factor for medium-voltage fuse holders
Technical Specifications
- Rated Current: 50 Amp (50A)
- Voltage Rating: 5.5 kV
- Maximum Interrupt Capacity: 50 kA
- Fuse Type: NX (Current-Limiting, Indoor Clip)
- Diameter: 2.15 inches
- Class: Distribution C
- Mounting Style: Indoor Clip (Mount Code 4)
- Manufacturer: Cooper Power Systems (McGraw Edison)
Typical Applications
- Medium-voltage distribution feeders (5.5 kV)
- Motor control circuits and transformer primary protection
- Utility substation equipment
- Industrial power distribution circuits
- OEM equipment and control cabinets rated 5.5 kV and below
Compatibility & Replacements
Compatible With
- Standard NX clip-style indoor fuse holders rated 5.5 kV and higher
- Distribution panels and switchgear designed for 50A, 5.5 kV fuses
- Medium-voltage equipment manufactured to ANSI/IEEE C37.41 fuse standards
- Cooper Power Systems and legacy McGraw Edison electrical installations
Replaces / Drop-In Replacement For
- Legacy McGraw Edison FA2H50 units
- Other 50A, 5.5 kV NX fuses with equivalent ratings and mount code 4
- Verify mounting and holding clip compatibility before installation
Works With
- ANSI/IEEE Std. C37.41 compliant equipment
- Standard NX clip fuse holders and switchboard inserts
- Medium-voltage distribution automation and monitoring systems
- Electrical systems requiring Distribution Class C current-limiting protection
