A6K125R - 125Amp Fuse

A6K125R - 125Amp Fuse

The Mersen A6K125R Amp-Trap® Class RK1 Fast-Acting Fuse is built for your electrical systems where quick protection really matters. Rated at 125 Amps, this fuse helps protect your branch circuits, feeder circuits, and connected equipment from overloads and short-circuit conditions before they turn into bigger problems.

In industrial and commercial settings, electrical faults can happen fast and without warning. When they do, having a fuse that reacts quickly can help reduce equipment damage and downtime. The A6K125R is designed to limit fault current quickly, helping protect switches, transformers, disconnects, control panels, and other important electrical components. That added protection can help keep systems running more smoothly and reduce time spent on repairs and troubleshooting.

The A6K125R is rated for 600VAC and 300VDC applications and features a high 200 kA interrupting rating, making it suitable for manufacturing facilities, HVAC systems, commercial power distribution equipment, industrial control panels, and other applications where fast fault clearing is important.

Key Features and Benefits

• 125 Amp Class RK1 fast-acting fuse: Current-limiting design helps reduce equipment damage.
• Fast response protection: Fast response during overload and short-circuit conditions.
• Branch and feeder protection: Designed for branch circuit and feeder protection.
• High interrupting rating: High 200 kA interrupting rating.
• Voltage compatibility: Rated for 600VAC and 300VDC systems.
• Secure mounting: Blade terminals for secure clip mounting.
• Equipment protection: Helps protect sensitive electrical equipment.
• Commercial and industrial use: Suitable for commercial and industrial applications.
• High fault-current systems: Designed for systems with high available fault currents.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A6K125R
  
• Series: Amp-Trap® A6K-R
  
• Fuse Class: Class RK1
  
• Fuse Type: Fast-Acting
  
• Ampere Rating: 125A
  
• 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: 46.1 mm
  
• Length: 244.6 mm
  
• Product Weight: 0.6622 kg
  
• Product Group: Low Voltage UL/CSA Fuses
  

Material Compliance and Certifications

• The A6K125R is manufactured for low-voltage UL and CSA fuse applications requiring dependable overcurrent protection in commercial and industrial electrical systems.
  

Where It Works Best

• Branch circuit protection
• Feeder circuit protection
• Industrial control panels
• Commercial power distribution systems
• Manufacturing equipment
• HVAC systems
• Backup protection applications
• Electrical distribution equipment
• 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 events.