A2D125R - 125 Amp Fuse

A2D125R - 125 Amp Fuse

The Mersen A2D125R is designed for your electrical systems that need dependable protection without constant nuisance fuse openings. Rated at 125 amps, this Class RK1 time-delay fuse helps you protect motors, feeders, and branch circuits from damaging short circuits and overloads while still allowing normal startup current to pass through. That makes it a solid fit for equipment that cycles on and off throughout the day, especially in commercial and industrial settings.

A helpful detail on this fuse is the built-in SmartSpot® indicator, which gives maintenance crews a quick visual sign when the fuse has opened. During troubleshooting, that can save valuable time and make it easier to get systems back online.

Key Features and Benefits

• 125A Class RK1 time-delay fuse: Designed for dependable overcurrent protection.
• Reduced nuisance openings: Helps prevent unnecessary fuse openings during motor startup.
• Fast short-circuit protection: Helps protect connected equipment from fault conditions.
• SmartSpot® indication: Built-in blown fuse indicator supports faster troubleshooting.
• 250VAC and 250VDC rating: Suitable for AC and DC applications.
• 200kA interrupting capacity: Designed for demanding fault-current protection.
• Fuse replacement compatibility: Suitable replacement for older Class H, K, and RK5 fuses.
• Tin-plated copper blade terminals: Provide reliable electrical connections.
• Commercial and industrial design: Built for commercial and industrial electrical systems.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D125R
  
• Series: Amp-Trap 2000® A2D-R
  
• Fuse Class: RK1
  
• Amp Rating: 125A
  
• Voltage Rating: 250VAC / 250VDC
  
• Frequency: 50/60 Hz
  
• Fuse Type: Time Delay
  
• Interrupting Rating: 200kA AC
  
• Mounting Type: Clip
  
• Terminal Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Body Material: PolyTube
  
• Indication Type: SmartSpot®
  
• Dimensions:
  • Length: 181.1 mm
  • Diameter: 39.6 mm
  • Weight: 0.3411 kg

Material Compliance and Certifications

• The A2D125R is part of Mersen’s low-voltage UL/CSA fuse line and is built for applications requiring dependable overcurrent protection and current-limiting performance in demanding electrical environments.
  

Where It Works Best

• This fuse is commonly installed in:
• Motor control centers
• HVAC equipment
• Industrial machinery
• Commercial power distribution systems
• Manufacturing facilities
• Branch circuits and feeders
• Switchgear and control panels