A2D500R - 500 Amp Fuse

A2D500R - 500 Amp Fuse

When electrical systems are pushed hard, reliable circuit protection becomes critical. The Mersen A2D500R Amp-Trap 2000® Class RK1 Time-Delay Fuse is built to help you keep industrial and commercial equipment protected from damaging overloads and short circuits without sacrificing performance during normal motor startup conditions. Rated at 500 amps with both 250VAC and 250VDC capability, this high-performance fuse delivers the fast fault-clearing action needed to help you protect motors, switches, starters, and other valuable electrical components from costly damage and downtime.

What makes the A2D500R especially useful in demanding environments is its combination of time-delay protection and high interrupting capacity. It can tolerate temporary inrush currents common in motors and heavy equipment while still reacting quickly under severe fault conditions. That balance helps reduce nuisance fuse openings while improving overall system reliability.

Designed with durable tin-plated copper blade terminals and a sturdy PolyTube insulating body, the A2D500R is made for long-term use in industrial power distribution systems, motor control centers, HVAC equipment, manufacturing facilities, and other demanding electrical applications. It also serves as an excellent replacement option for older Class H, K, and RK5 fuses already installed in the field, making upgrades and retrofits more straightforward.

Key Features and Benefits

• 500 Amp Class RK1 fuse: Designed for advanced overcurrent protection.
• Time-delay performance: Helps prevent unnecessary fuse openings during motor startup.
• Fast short-circuit response: Helps reduce damage to electrical equipment.
• SmartSpot® indication system: Provides fast visual identification of blown fuses.
• Equipment protection: Helps protect motors, starters, switches, and branch circuits from severe fault conditions.
• Replacement compatibility: Excellent replacement solution for older Class H, K, and RK5 fuses.
• Dual voltage capability: Rated for both AC and DC applications.
• High interrupting rating: 200kA interrupting rating supports demanding industrial environments.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D500R
  
• Series: A2D-R / Amp-Trap 2000®
  
• Fuse Class: Class RK1
  
• Fuse Type: Time-Delay
  
• Ampere Rating: 500A
  
• Rated Voltage AC: 250VAC
  
• Rated Voltage DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200kA AC
  
• Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Style: Clip
  
• Indication System: SmartSpot®
  
• Body Material: PolyTube
  
• Product Length: 10.38 in
  
• Product Diameter: 3.12 in
  
• Product Weight: 2.933 lb
  

Material Compliance and Certifications

• RoHS Compliant: Supports environmental and material compliance requirements.
• UL/CSA applications: Designed for low voltage fuse applications.
• AC and DC compatibility: Suitable for both AC and DC systems.
• Industrial protection standards: Manufactured to meet demanding industrial electrical protection standards.
  

Where It Works Best

• Motor control centers
• Industrial manufacturing equipment
• HVAC systems
• Commercial and industrial distribution panels
• Feeders and branch circuits
• Heavy-duty machinery
• Processing plants and production facilities
• Retrofit applications replacing older Class H, K, or RK5 fuses