A6K400R - 400Amp Fuse

A6K400R - 400Amp Fuse

The Mersen A6K400R Amp-Trap® Class RK1 Fast-Acting Fuse is built for your electrical systems that need reliable protection under demanding conditions. Rated at 400 Amps, this fuse helps protect your branch circuits and feeder circuits from overloads and short circuits before they can damage connected equipment or interrupt operations.

When a fault happens, the A6K400R is designed to respond quickly, helping reduce the amount of fault current passing through the system. That quick response can help protect your switchboards, transformers, disconnects, control panels, and other important electrical equipment commonly found in commercial and industrial facilities.

With a 200 kA interrupting rating, the A6K400R is often used in manufacturing plants, commercial buildings, HVAC systems, industrial machinery, and power distribution equipment where fast overcurrent protection is important.

Key Features and Benefits

• 400 Amp Class RK1 Fast-Acting Fuse: Helps protect against overloads and short circuits.
• Current-Limiting Design: Helps reduce equipment damage.
• Fast Fault Clearing: Provides improved protection.
• High Interrupting Rating: 200 kA interrupting rating.
• Dual Voltage Rating: Rated for 600VAC and 300VDC applications.
• Blade Terminals: Blade terminals for secure clip mounting.
• Commercial and Industrial Use: Designed for commercial and industrial electrical systems.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A6K400R
  
• Series: Amp-Trap® A6K-R
  
• Fuse Class: Class RK1
  
• Fuse Type: Fast-Acting
  
• Ampere Rating: 400A
  
• AC Voltage Rating: 600VAC
  
• DC Voltage Rating: 300VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Terminal Type: Blade
  
• Mounting: Clip
  
• Terminal Material: Tin-Plated Copper
  
• Body Material: PolyTube
  
• Diameter: 65.1 mm
  
• Length: 295.4 mm
  
• Product Weight: 1.4606 kg
  
• Product Group: Low Voltage UL/CSA Fuses
  

Material Compliance and Certifications

• UL and CSA Applications: The A6K400R is manufactured for low-voltage UL and CSA fuse applications requiring dependable overcurrent protection in commercial and industrial electrical systems.
  

Where It Works Best

The A6K400R is commonly used in:

• Branch circuit protection
• Feeder circuit protection
• Industrial control panels
• Commercial power distribution systems
• Manufacturing equipment
• HVAC systems
• Electrical distribution equipment
• Backup protection applications
• Systems with high available fault currents

Its fast-acting design makes it a good fit for applications where electrical equipment needs quick protection during overloads and short-circuit conditions.