A6D350R - 350Amp Fuse

A6D350R - 350Amp Fuse

When you’re protecting high-capacity electrical systems, you need a fuse that can respond fast during dangerous fault conditions while still handling the everyday demands of motor startup currents. The Mersen A6D350R Amp-Trap 2000® Class RK1 time-delay fuse is engineered to do exactly that. Rated for 350 amps and designed for both 600VAC and 600VDC applications, this high-performance fuse delivers dependable branch circuit, feeder, and mains protection for commercial and industrial power systems where downtime and equipment damage can become expensive problems.

What sets the A6D350R apart is its ability to provide advanced current-limiting protection without unnecessary nuisance openings. During extreme short circuits, the fuse reacts quickly enough to help protect motor starters, switches, contactors, and other sensitive electrical components from severe damage. At the same time, its time-delay characteristics allow temporary motor inrush currents to pass during startup, helping maintain smoother operation in demanding environments.

Key Features and Benefits

• 350A Class RK1 time-delay fuse: For industrial and commercial electrical protection.
• Fast current-limiting action: Helps reduce equipment damage during short circuits.
• Time-delay performance: Minimizes nuisance openings caused by motor startup currents.
• SmartSpot® visual indication: Simplifies maintenance and troubleshooting.
• 600V AC/DC capability: Suitable for both AC and DC applications up to 600V.
• High interrupting capacity: High 200 kA interrupting rating for demanding fault-current environments.
• Blade terminal design: With tin-plated copper connections for dependable conductivity.
• Replacement compatibility: Compatible replacement for older Class H, K, and RK5 fuses.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A6D350R
  
• Series: Amp-Trap 2000® A6D-R
  
• Product Type: Class RK1 Time-Delay Fuse
  
• Ampere Rating: 350A
  
• Voltage Rating AC: 600VAC
  
• Voltage Rating DC: 600VDC
  
• Frequency: 50/60 Hz
  
• AC/DC Application: AC/DC
  
• Fuse Class: RK1
  
• Fuse Speed/Characteristic: Time Delay
  
• Interrupting Rating: 200 kA
  
• Indication System: SmartSpot®
  
• Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Type: Clip
  
• Body Material: PolyTube
  
• Product Diameter: 65 mm
  
• Product Length: 295.4 mm
  
• Product Weight: 1.4606 kg
  

Material Compliance and Certifications

• The Mersen A6D350R is part of the Amp-Trap 2000® low-voltage UL/CSA fuse family and is designed to provide IEC Type 2 “no damage” coordinated protection when properly applied.
• Its high interrupting capacity and advanced current-limiting performance help improve electrical system safety while protecting connected equipment in demanding commercial and industrial installations.
  

Where It Works Best

• The A6D350R fuse is well suited for a variety of heavy-duty electrical protection applications, including:
  • Motor control centers (MCCs)
  • Industrial manufacturing equipment
  • HVAC and refrigeration systems
  • Pumps, compressors, and conveyor systems
  • Commercial power distribution systems
  • Feeders and branch circuit protection
  • Industrial automation and process control equipment
  • Electrical systems with high available fault currents
  • Retrofit projects replacing older Class H, K, or RK5 fuses
• For facilities that depend on reliable circuit protection and reduced equipment downtime, the Mersen A6D350R delivers the speed, protection, and performance required in modern electrical systems.