A2D450R - 450 Amp Fuse

A2D450R - 450 Amp Fuse

The Mersen A2D450R Amp-Trap 2000® fuse is built for electrical systems that can’t afford unreliable protection. Rated at 450 amps, this Class RK1 time-delay fuse is designed to handle the momentary startup surges common in motors and heavy equipment while still reacting quickly when a serious fault occurs. That balance helps you protect valuable electrical components without causing unnecessary downtime from nuisance fuse openings.

In real-world applications, the A2D450R is often used in motor control centers, distribution panels, HVAC equipment, and industrial power systems where dependable overcurrent protection is a must. Its current-limiting design helps you reduce the amount of fault energy reaching downstream equipment, which can help minimize damage to switches, starters, and connected components during short-circuit events.

Mersen also includes its SmartSpot® indicator, making it easier to identify when the fuse has opened. For electricians and maintenance teams, that can save valuable troubleshooting time during repairs or routine service. The blade-style terminals are made from tin-plated copper for reliable conductivity, while the durable PolyTube body is designed to hold up in demanding industrial environments.

Key Features and Benefits

• 450 Amp Class RK1 time-delay fuse: Designed for industrial and commercial electrical systems.
• Dual voltage capability: Rated for 250VAC and 250VDC applications.
• Motor startup protection: Handles temporary motor startup currents without unnecessary fuse openings.
• High interrupting rating: 200 kA interrupting rating for high-level short-circuit protection.
• SmartSpot® indication: Built-in indicator helps quickly identify opened fuses.
• Current-limiting protection: Helps reduce damage to electrical equipment during fault conditions.
• Replacement compatibility: Compatible replacement for many older Class H, K, and RK5 fuses.
• Tin-plated copper blade terminals: Provide dependable electrical connections.
• Durable PolyTube construction: Designed for long service life.
• Versatile application support: Suitable for feeders, branch circuits, motor protection, and control panels.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A2D450R
  
• Product Series: A2D-R / Amp-Trap 2000®
  
• Fuse Class: Class RK1
  
• Fuse Type: Time-Delay
  
• Ampere Rating: 450A
  
• Rated Voltage AC: 250VAC
  
• Rated Voltage DC: 250VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Type: 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 AC and DC circuit protection systems.
• Industrial standards: Manufactured to meet industrial overcurrent protection standards.
  

Where It Works Best

• The Mersen A2D450R is commonly used in manufacturing facilities, commercial buildings, HVAC systems, motor control centers, and industrial distribution equipment where reliable fuse protection is critical. Its time-delay design works especially well in systems with motors or equipment that create temporary inrush currents during startup.