A3T800 - 800 Amp Fuse

A3T800 - 800 Amp Fuse

If you’re protecting high-capacity electrical equipment, the Mersen A3T800 Amp-Trap® Class T Fuse is built to handle the job. This fast-acting 800A fuse is designed to react quickly during overloads and short-circuit events, helping you reduce damage to connected equipment and keeping downtime to a minimum. Its compact Class T design also makes it a practical option when panel space is limited.

The A3T800 combines strong current-limiting protection with a smaller footprint than many comparable fuse types. That makes it a solid fit for switchboards, motor control centers, transformers, and other demanding power distribution applications. Mersen uses a glass melamine body for added strength and dimensional stability, while the copper blade terminals provide dependable conductivity and secure bolted connections. The catalog number is permanently stamped into the blades as well, which can make future identification and replacement much easier during maintenance work.

For facilities running critical electrical systems, having reliable overcurrent protection matters. With a 200kA interrupting rating and fast fault-clearing performance, the A3T800 is designed to help you protect electrical infrastructure before faults turn into expensive repairs or unexpected shutdowns.

Key Features and Benefits

• Fast-acting Class T fuse for quick fault response
• Helps limit damage caused by overloads and short circuits
• Compact design saves space inside electrical equipment
• 800A rating for demanding commercial and industrial systems
• Rated for 300VAC and 160VDC applications
• High 200kA interrupting rating
• Glass melamine body for added durability and stability
• Copper blade terminals provide reliable electrical connections
• Bolted mounting supports secure installation
• Permanent catalog marking simplifies identification and replacement
• Suitable for AC and DC systems
• RoHS compliant

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A3T800
  
• Product Type: Fast-Acting Fuse
  
• Fuse Class: Class T
  
• Series: A3T
  
• Ampere Rating: 800A
  
• Voltage Rating AC: 300VAC
  
• Voltage Rating DC: 160VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200kA AC
  
• Speed Characteristic: Fast-Acting
  
• Terminal Type: Blade
  
• Terminal Material: Copper
  
• Mounting Type: Bolted
  
• Body Material: GMG Glass Melamine
  
• Product Length: 85.9 mm
  
• Product Diameter: 52.8 mm
  
• Product Weight: 0.3615 kg
  
• UPC: 782001890810
  

Material Compliance and Certifications

• RoHS Compliant
• Designed for low-voltage UL/CSA fuse applications
• Suitable for commercial and industrial electrical systems
• Compatible with AC and DC applications
  

Where It Works Best

• The Mersen A3T800 Class T Fast-Acting Fuse is commonly used in:
• Industrial power distribution systems
• Switchboards and panelboards
• Motor control centers
• Transformers and power supplies
• Commercial electrical service equipment
• UPS and backup power systems
• Manufacturing and automation equipment
• High-capacity protection circuits
• Its fast response time and high interrupting capacity make it especially useful in systems where protecting sensitive electrical equipment is a top priority.