A2K125R - 125Amp Fuse

A2K125R - 125Amp Fuse

When electrical systems face high fault currents, dependable circuit protection becomes critical. The Mersen A2K125R Amp-Trap® Fuse is built to respond quickly when it matters most, helping protect valuable equipment from damaging short circuits and overload conditions before they become costly problems. Designed as a Class RK1 fast-acting fuse, this 125A fuse delivers outstanding current-limiting performance in demanding commercial and industrial environments where reliability and uptime are essential.

Engineered for both 250VAC and 250VDC applications, the A2K125R combines fast response times with durable construction to help maintain safer and more efficient electrical systems. Its high 200 kA interrupting rating makes it an excellent choice for installations with elevated available fault currents, including motor control centers, switchgear, panelboards, and industrial distribution systems. The fuse features rugged blade terminals made from tin-plated copper for dependable conductivity and corrosion resistance, while the PolyTube body adds durability for long-term performance in tough operating conditions.

Whether you're maintaining a manufacturing facility, upgrading electrical distribution equipment, or protecting sensitive components from unexpected faults, the Mersen A2K125R fuse offers the speed, reliability, and protection professionals trust to keep systems running smoothly.

Key Features and Benefits

• Fast-acting Class RK1 fuse: Engineered for advanced overcurrent protection.
• 125A rating: Ideal for industrial and commercial electrical applications.
• 250VAC / 250VDC rated: Suitable for both AC and DC systems for added versatility.
• Current-limiting design: Helps reduce thermal and mechanical damage during faults.
• High interrupting capacity: 200 kA interrupting capacity for demanding high fault-current environments.
• Tin-plated copper blade terminals: Provides reliable conductivity and corrosion resistance.
• Branch and feeder circuit protection: Designed for dependable protection in demanding systems.
• Rugged PolyTube insulating body: Supports long-lasting operation.
• Clip-mount configuration: Allows straightforward installation and maintenance.
• Helps minimize downtime: Protects expensive electrical equipment during fault conditions.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2K125R
  
• Product Series: A2K-R
  
• Fuse Class: Class RK1
  
• Fuse Type: Fast-Acting
  
• Ampere Rating: 125A
  
• Voltage Rating AC: 250VAC
  
• Voltage Rating DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Type: Clip
  
• Body Material: PolyTube
  
• Product Length: 181.1 mm
  
• Product Diameter: 39.7 mm
  
• Product Weight: 0.367 kg
  
• UPC / EAN: 782001915261
  

Material Compliance and Certifications

• RoHS Compliant: Supports environmental compliance requirements.
• Low-voltage UL/CSA applications: Designed for use in low-voltage fuse systems.
• Class RK1 current-limiting protection: Meets industry requirements for dependable circuit protection.
  

Where It Works Best

• Industrial power distribution systems
• Motor control centers (MCCs)
• Panelboards and switchgear
• Manufacturing facilities and processing plants
• HVAC equipment protection
• Branch and feeder circuit protection
• Backup protection for sensitive electrical equipment
• Commercial electrical infrastructure with high available fault currents