Overview
The Ferraz A025R300 is a 250V AC/DC rated fuse with a 300-ampere capacity, designed for industrial overcurrent protection applications. Manufactured by Ferraz Shawmut (now part of Mersen), this low-voltage fuse is engineered to safeguard electrical circuits in motor starting circuits, transformer protection, and mains distribution. The A025R300 offers a drop-in replacement solution for facilities requiring Class R fuse protection with dual AC/DC ratings.
Key Features
- 300-ampere continuous current rating
- 250V AC/DC dual voltage rating for flexible deployment
- Low-voltage Class R fuse design for standard industrial circuits
- UL 248 and CSA certified for North American compliance
- Reliable melting time characteristics for motor and transformer protection
Technical Specifications
The Ferraz A025R300 meets industry standards for low-voltage power fuses. This fuse is rated for 250 volts in both AC and DC applications and carries a 300-ampere current rating. The fuse features a standard Class R cartridge form factor and is compatible with Class R fuse holders rated for 300A or higher. Typical interrupting ratings for similar Ferraz Class R fuses in this amperage class are approximately 200 kiloamperes (kA) at 250V AC and 20 kA at 250V DC, providing substantial fault protection.
Typical Applications
- Motor circuit protection and motor control centers
- Transformer primary and secondary circuit safeguarding
- Distribution panel and main switch protection
- Industrial process equipment and machinery circuits
- DC power supply and battery charging systems
Compatibility & Replacements
Compatible With
- Ferraz Shawmut Class R fuse blocks and holders rated 300A or higher
- Standard low-voltage electrical distribution panels
- Motor control centers (MCC) with Class R fuse accommodation
- Industrial switchboards and disconnect switches with Class R cartridge sockets
Replaces / Drop-In Replacement For
The Ferraz A025R300 is a direct replacement for equivalent 300A, 250V Class R fuses. Verify specific part number compatibility with your equipment documentation or system integrator before ordering to ensure form factor and interrupting rating match your application requirements.
Works With
- Class R fuse holders and blocks (Ferraz Shawmut, Mersen, and equivalent brands)
- UL 248-12 and CSA C22.2 certified electrical equipment
- Standard industrial control systems and power distribution architectures
