A2K450R - 450Amp Fuse

A2K450R - 450Amp Fuse

The Mersen A2K450R Amp-Trap® Class RK1 fuse is built for electrical systems where reliable protection is critical. Designed with a fast-acting response, this 450A fuse helps protect circuits and equipment from short circuits and overloads before damage has a chance to spread. In busy industrial and commercial environments, that quick response can help reduce downtime, protect valuable equipment, and keep your operations moving.

With a 200kA interrupting rating, the A2K450R is well-suited for systems with high available fault currents. It’s commonly used in branch circuits, feeder circuits, motor control centers, and power distribution equipment where dependable overcurrent protection matters every day. Because it is rated for both 250VAC and 250VDC applications, it can also fit a variety of installation requirements across different electrical systems.

Mersen designed this fuse with durable materials that hold up well in demanding conditions. The PolyTube body offers solid insulation and durability, while the tin-plated copper blade terminals provide reliable conductivity and help resist corrosion over time. Its clip-mount configuration allows for secure installation and easier maintenance when you needed a replacement.

For facilities that depend on consistent electrical performance, the A2K450R delivers the fast protection and reliability professionals look for in a Class RK1 fuse.

Key Features and Benefits

• Fast-acting Class RK1 fuse designed for quick fault response
• 450 Amp rating for industrial and commercial electrical systems
• High 200kA interrupting rating for applications with elevated fault currents
• Helps protect equipment from overloads and short circuits
• Rated for both 250VAC and 250VDC systems
• Tin-plated copper blade terminals support dependable conductivity
• PolyTube body provides durability and insulation protection
• Suitable for branch circuits, feeder circuits, and backup protection
• Clip mounting design for secure installation
• Helps reduce equipment damage and maintenance downtime
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2K450R
  
• Product Type: Amp-Trap® Fast-Acting Fuse
  
• Fuse Class: Class RK1
  
• Ampere Rating: 450A
  
• Rated Voltage AC: 250VAC
  
• Rated Voltage DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA
  
• Fuse Characteristic: Fast-Acting
  
• Terminal Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Type: Clip
  
• Body Material: PolyTube
  
• Product Length: 263.7 mm
  
• Product Diameter: 65.1 mm
  
• Product Weight: 1.3331 kg
  
• UPC: 782001915391
  

Material Compliance and Certifications

• RoHS Compliant
• Suitable for UL electrical system applications
• Designed for low-voltage UL/CSA fuse applications
• Compatible with AC and DC circuit protection requirements
  

Where It Works Best

• The Mersen A2K450R works well in industrial facilities, commercial buildings, manufacturing equipment, control panels, motor control centers, and electrical distribution systems where fast fault protection is important. It is especially useful in applications with high available short-circuit current levels and systems that require dependable current-limiting protection to help keep equipment operating safely.