A2D150R - 150 Amp Fuse

A2D150R - 150 Amp Fuse

The Mersen A2D150R Amp-Trap® 2000® fuse is made for electrical systems that need your reliable protection day after day. With a 150A rating and Class RK1 time-delay performance, it helps you protect motors, feeders, and branch circuits from overloads and short circuits without opening during normal motor startup currents.

In real-world applications, that matters. Equipment like pumps, compressors, conveyors, and HVAC systems often draw higher inrush current when starting up. The A2D150R is designed to handle those temporary surges while still reacting quickly during serious fault conditions. That quick response can help reduce damage to switches, starters, and other important electrical components.

Another feature technicians appreciate is the built-in SmartSpot® indicator. Instead of spending extra time tracking down a blown fuse, maintenance crews get a clear visual indication that helps speed up troubleshooting and replacement.

The A2D150R is also a straightforward upgrade for many older Class H, K, and RK5 fuse installations. For facilities looking to improve circuit protection without major system changes, this fuse offers a practical solution backed by Mersen’s long-standing reputation in electrical protection products.

Key Features and Benefits

• 150 Amp Class RK1 time-delay fuse: Designed for motor, feeder, and branch circuit protection.
• Helps reduce nuisance openings: During motor startup.
• Fast fault-clearing action: Helps limit equipment damage.
• SmartSpot® blown fuse indicator: For easier maintenance.
• Rated for both 250VAC and 250VDC applications: Suitable for AC and DC systems.
• 200 kA interrupting rating: For high fault-current protection.
• Tin-plated copper blade terminals: For dependable connect.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D150R
  
• Product Type: Class RK1 Time-Delay Fuse
  
• Ampere Rating: 150A
  
• Rated Voltage AC: 250VAC
  
• Rated Voltage DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: RK1
  
• Speed / Characteristic: Time Delay
  
• Interrupting Rating: 200 kA
  
• Indication Type: SmartSpot® Visual Indicator
  
• Terminal Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Style: Clip
  
• Insulating Material: PolyTube
  
• Product Length: 181.1 mm
  
• Product Diameter: 39.6 mm
  
• Product Weight: 0.3411 kg
  

Material Compliance and Certifications

• Manufactured to meet UL and CSA low-voltage fuse requirements: Designed for branch circuit and feeder protection applications.
• Complies with Class RK1 fuse standards: Suitable for AC and DC electrical systems.
• SmartSpot® indication system: Supports faster maintenance identification.
  

Where It Works Best

• The A2D150R works well in motor control centers, HVAC systems, industrial machinery, manufacturing equipment, and commercial power distribution panels. Its time-delay characteristics make it especially useful in applications with higher startup currents, including pumps, compressors, and conveyors. It’s also a solid option for upgrading older fuse installations where improved current-limiting protection is needed.