A2D110R - 110 Amp Fuse

A2D110R - 110 Amp Fuse

The Mersen A2D110R is a 110A Class RK1 time-delay fuse designed to help protect industrial and commercial electrical systems from overloads and short circuits. It’s commonly used in motor circuits, feeders, and branch circuits where equipment sees temporary startup surges but still needs reliable fault protection.

One of the advantages of the A2D110R is its ability to handle motor inrush current without opening too quickly. That helps reduce nuisance shutdowns while still providing fast protection during serious fault conditions. In many facilities, that can help limit damage to motor starters, switches, and other connected components.

This fuse is part of the Amp-Trap 2000® A2D-R series and includes Mersen’s SmartSpot® indicator, which gives maintenance teams a quick visual way to identify when the fuse has operated. The blade-style design, tin-plated copper terminals, and durable PolyTube body make it a dependable option for demanding electrical applications.

The A2D110R can also be used as a replacement for older Class H, K, and RK5 fuses, making it a practical choice for maintenance, upgrades, and retrofit projects.

Key Features and Benefits

• 110 Amp Class RK1 fuse: Designed for overcurrent and short-circuit protection.
• Time-delay design: Helps prevent unnecessary fuse openings during motor startup.
• 250VAC and 250VDC rating: Designed for AC and DC systems.
• Fast fault-current response: Helps protect equipment during high fault current conditions.
• SmartSpot® blown fuse indicator: Supports faster troubleshooting.
• Equipment protection: Helps protect motors, feeders, branch circuits, motor starters, and switches.
• 200 kA interrupting rating: Designed for demanding fault-current applications.
• Replacement compatibility: Can replace older Class H, K, and RK5 fuses.
• PolyTube body: Provides durable insulation.
• Tin-plated copper blade terminals: Support reliable electrical connections.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D110R
  
• Series: Amp-Trap 2000® A2D-R
  
• Fuse Class: RK1
  
• Fuse Type: Time-Delay
  
• Ampere Rating: 110A
  
• Voltage Rating (AC): 250VAC
  
• Voltage Rating (DC): 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA
  
• Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Style: Clip
  
• Indication System: SmartSpot®
  
• Body Material: PolyTube
  
• Dimensions:
  • Length: 181.1 mm
  • Diameter: 39.6 mm
  • Weight: 0.3411 kg

Material Compliance and Certifications

• Designed for UL/CSA low-voltage fuse applications
• Meets Class RK1 fuse requirements
• Supports IEC Type 2 “No Damage” protection in coordinated motor circuits
• Suitable for both AC and DC applications
• Manufactured using industrial-grade insulating and conductive materials
  

Where It Works Best

• The Mersen A2D110R is used in a wide range of industrial and commercial applications, including:
• Motor control centers (MCCs)
• HVAC equipment
• Manufacturing systems
• Industrial machinery
• Commercial distribution panels
• Conveyor systems
• Pump systems
• Branch circuit protection
• Feeder protection
• Retrofit fuse replacement projects