A2D400R - 400 Amp Fuse

A2D400R - 400 Amp Fuse

The Mersen A2D400R Amp-Trap 2000® fuse is built for your electrical systems that need dependable protection without sacrificing performance. Designed for industrial and commercial applications, this 400A Class RK1 time-delay fuse helps protect motors, feeders, branch circuits, and other critical equipment from damaging overloads and short circuits. Its time-delay design allows motors and other equipment to handle normal startup surges without unnecessary fuse openings, while still reacting fast during serious fault conditions.

The fuse features a durable PolyTube body and tin-plated copper blade terminals for reliable conductivity and long service life. Whether you're installing it in a manufacturing facility, HVAC system, motor control center, or commercial distribution panel, the A2D400R delivers the level of protection electrical professionals expect from the Mersen Amp-Trap 2000® series.

Key Features and Benefits

• 400A Class RK1 time-delay fuse for industrial and commercial applications
• Helps protect motors, feeders, and branch circuits from overloads and short circuits
• Time-delay performance helps prevent nuisance openings during motor startup
• 250VAC and 250VDC rated for AC and DC systems
• High 200 kA interrupting rating for advanced fault protection
• SmartSpot® indication system allows quick visual fuse status identification
• Compatible replacement for older Class H, K, and RK5 fuses
• Tin-plated copper blade terminals provide dependable electrical connections
• Durable PolyTube construction designed for long-term performance
• Suitable for systems where reliability and reduced downtime are important
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D400R
  
• Product Series: A2D-R / Amp-Trap 2000®
  
• Fuse Class: Class RK1
  
• Fuse Type: Time-Delay
  
• Ampere Rating: 400A
  
• Voltage Rating AC: 250VAC
  
• Voltage Rating DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA
  
• Indication Type: SmartSpot®
  
• Mounting Type: Clip
  
• Terminal Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Body Material: PolyTube
  
• Product Length: 219.2 mm
  
• Product Diameter: 52.3 mm
  
• Product Weight: 0.7439 kg
  
• Compliance: RoHS Compliant
  

Material Compliance and Certifications

• The Mersen A2D400R fuse is RoHS compliant and designed for use in UL and CSA low-voltage fuse applications. It meets the performance standards required for reliable circuit protection in industrial and commercial electrical systems.
  

Where It Works Best

The A2D400R fuse works well in applications that require dependable overcurrent protection along with the ability to handle temporary startup currents from motors and heavy equipment.

• Common applications include:
• Motor control centers
• Manufacturing equipment
• HVAC systems and compressors
• Commercial electrical distribution panels
• Feeders and branch circuits
• Pump control systems
• Conveyor systems
• Industrial automation equipment
• Retrofit projects replacing Class H, K, or RK5 fuses