A2D20R - 20 Amp Fuse

A2D20R - 20 Amp Fuse

If you’re protecting motor circuits or sensitive electrical equipment, the Mersen A2D20R Amp-Trap 2000® fuse is designed to do the job without creating unnecessary headaches. This 20A Class RK1 time-delay fuse is made to handle the brief surge of current that happens when motors start up, while still reacting quickly when a real fault occurs. That means fewer nuisance fuse openings and better protection for switches, starters, feeders, and branch circuits.

Built with a ferrule design, tin-plated copper terminals, and a durable PolyTube body, this fuse is made for real working environments—not just specifications on paper. With a high 200 kA interrupting rating, it’s ready for applications where available fault current can be a concern.

Key Features and Benefits

• 20A Class RK1 time-delay fuse: Designed for motor and branch circuit protection.
• Helps prevent nuisance openings: Handles startup current without unnecessary fuse openings.
• Fast short-circuit response: Helps protect connected equipment during fault conditions.
• SmartSpot® indicator: Makes blown fuse identification easier.
• Rated for both 250VAC and 250VDC applications: Suitable for AC and DC circuit protection.
• High 200 kA interrupting capacity: Ready for applications where available fault current can be a concern.
• Compact ferrule design: Intended for clip mounting applications.
• Replacement option: Good replacement option for older Class H, K, and RK5 fuses.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D20R
  
• Series: Amp-Trap 2000® A2D-R
  
• Fuse Class: RK1
  
• Fuse Type: Time-Delay
  
• Amp Rating: 20A
  
• Voltage Rating: 250VAC / 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA
  
• Terminal Type: Ferrule
  
• Mounting: Clip Mount
  
• Indication Type: SmartSpot®
  
• Terminal Material: Tin-Plated Copper
  
• Body Material: PolyTube
  
• Diameter: 14.2 mm
  
• Length: 50.8 mm
  

Material Compliance and Certifications

• ROHS Compliant: Manufactured in compliance with applicable material standards.
• UL low-voltage fuse applications: Designed for UL low-voltage fuse applications.
• AC and DC circuit protection: Suitable for both AC and DC protection requirements.
• Class RK1 standards: Manufactured to Class RK1 fuse standards.
  

Where It Works Best

• The Mersen A2D20R is commonly used in motor control centers, HVAC equipment, industrial machinery, manufacturing facilities, commercial electrical systems, and branch circuit applications where dependable overcurrent protection is important.