A6D45R - 45 Amp Fuse

A6D45R - 45 Amp Fuse

When electrical systems are pushed hard every day, dependable circuit protection becomes critical. The Mersen A6D45R Amp-Trap 2000® Class RK1 Time-Delay Fuse is built to help keep industrial and commercial equipment running safely while protecting valuable electrical components from damaging overloads and short circuits. Rated at 45 amps with dual 600VAC and 600VDC capability, this high-performance fuse reacts quickly during fault conditions to help minimize damage to motors, starters, switches, and control equipment—yet still allows temporary inrush currents during motor startup. That balance between protection and performance makes the A6D45R a smart choice for demanding applications where reliability matters.

What really sets the A6D45R apart is its ability to reduce unnecessary downtime. The integrated SmartSpot® visual indication system makes it easy for maintenance teams to quickly identify when a fuse has opened, cutting down troubleshooting time and helping facilities get back up and running faster. Designed as part of Mersen’s trusted Amp-Trap 2000® A6D-R series, this Class RK1 fuse also offers IEC Type 2 “no damage” protection when properly applied, making it ideal for protecting modern motor circuits, feeders, branch circuits, and sensitive electrical equipment. Its durable PolyTube construction and tin-plated copper ferrule terminals provide dependable conductivity and long-term durability in harsh industrial environments.

Whether you’re upgrading an aging electrical system or replacing older Class H, K, or RK5 fuses, the Mersen A6D45R delivers the fast current-limiting protection and time-delay performance today’s electrical systems demand.

Key Features and Benefits

• Reliable protection: Designed for reliable protection of motors, feeders, and branch circuits.
• Time-delay functionality: Helps prevent nuisance fuse openings during motor startup.
• Fast-acting current limitation: Helps reduce damage during severe fault conditions.
• SmartSpot® visual indication: Simplifies fuse identification and maintenance.
• High interrupting rating: High 200 kA interrupting rating for demanding industrial applications.
• AC/DC compatibility: Compatible with both AC and DC systems up to 600 volts.
• IEC Type 2 support: Helps support IEC Type 2 coordinated protection requirements.
• Replacement compatibility: Direct replacement option for older Class H, K, and RK5 fuses.
• Durable PolyTube body: Built for long service life.
• Tin-plated copper ferrule terminals: Provide dependable electrical connections.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A6D45R
  
• Series: Amp-Trap 2000® A6D-R
  
• Fuse Class: RK1
  
• Fuse Type: Time-Delay
  
• Amp Rating: 45A
  
• Voltage Rating: 600VAC / 600VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA
  
• Current Type: AC/DC
  
• Indication Type: SmartSpot®
  
• Terminal Type: Ferrule
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Type: Clip
  
• Body Material: PolyTube
  
• Diameter: 26.9 mm
  
• Length: 139.7 mm
  
• Product Weight: 0.1542 kg
  
• UPC/EAN: 782001992026
  

Material Compliance and Certifications

• The Mersen A6D45R is engineered for low-voltage UL and CSA fuse applications and is manufactured to meet the performance standards expected in industrial and commercial power distribution systems. Its Class RK1 current-limiting design helps provide enhanced protection for electrical equipment and coordinated motor circuit applications.
  

Where It Works Best

The A6D45R is a strong fit for electrical systems that demand dependable overcurrent protection without sacrificing operational efficiency. Common applications include:

• Motor control centers (MCCs)
• HVAC and refrigeration systems
• Manufacturing and processing equipment
• Pumps, compressors, and conveyor systems
• Commercial power distribution panels
• Industrial automation equipment
• Feeders and branch circuit protection
• Electrical retrofit and modernization projects
• Systems with high inrush motor startup currents
• Facilities requiring high interrupting capacity protection

From busy manufacturing plants to commercial facilities with mission-critical equipment, the Mersen A6D45R helps deliver safer operation, reduced downtime, and dependable circuit protection where it counts most.