A3T1000 - 1000 Amp Fuse

A3T1000 - 1000 Amp Fuse

When electrical systems demand serious protection, the Mersen A3T1000 Class T Fast-Acting Fuse is built to answer the call. Designed for high-capacity commercial and industrial applications, this 1000A fast-acting fuse helps protect critical equipment from damaging overcurrents and short circuits before costly downtime becomes a bigger problem. Its advanced current-limiting design reacts quickly under fault conditions, helping safeguard switchboards, motor control centers, UPS systems, and other power distribution equipment that keeps operations moving. Despite its powerful protection capabilities, the compact Class T footprint saves valuable panel space and helps prevent replacement with improperly rated fuses.

Whether you're maintaining an industrial facility, upgrading electrical infrastructure, or supporting mission-critical systems, this Mersen Amp-Trap® fuse delivers the fast response and high interrupting capacity professionals rely on every day. Its AC/DC compatibility and bolted blade connection design also provide flexibility for a wide range of modern electrical installations where safety, reliability, and performance matter most.

Key Features and Benefits

• Fast-Acting Overcurrent Protection – Quickly interrupts fault currents to help reduce damage to electrical equipment and minimize downtime.
• Advanced Current-Limiting Design – Helps reduce thermal and magnetic stress during short-circuit events.
• 1000 Amp Capacity – Ideal for heavy-duty industrial and commercial electrical systems requiring high-amperage protection.
• Compact Class T Footprint – Saves space inside electrical panels and switchgear assemblies.
• High Interrupting Rating – Rated up to 200kA AC interrupting capacity for demanding high fault-current applications.
• Durable Glass Melamine Construction – Offers excellent dimensional stability and long-term durability.
• Copper Blade Terminals – Promotes reliable electrical conductivity and secure bolted connections.
• AC and DC Rated – Suitable for a variety of power distribution and control applications.
• Permanent Fuse Identification – Catalog markings stamped directly into the blades for easy maintenance and verification.
• RoHS Compliant – Supports environmentally conscious installation requirements.
  

Technical Specifications

• Manufacturer Part Number: A3T1000
  
• Product Type: Class T Fast-Acting Fuse
  
• Series: A3T
  
• Ampere Rating: 1000A
  
• Voltage Rating (AC): 300VAC
  
• Voltage Rating (DC): 160VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: Class T
  
• Speed/Characteristic: Fast-Acting
  
• Interrupting Rating: 200kA AC
  
• Mounting Type: Bolted
  
• Terminal Type: Blade
  
• Terminal Material: Copper
  
• Body Material: GMG (Glass Melamine)
  
• Product Diameter: 64 mm
  
• Product Length: 101.6 mm
  
• Product Weight: 0.6577 kg
  
• Compliance: RoHS Compliant
  
• UPC/EAN: 782001890834
  

Material Compliance and Certifications

• The Mersen A3T1000 fuse is RoHS compliant, making it suitable for installations that require adherence to environmental material standards. Its Class T fast-acting design and high interrupting capacity make it a dependable solution for low-voltage electrical protection applications where safety and performance are critical.
  

Where It Works Best

• Industrial power distribution systems
• Switchboards and panelboards
• Motor control centers (MCCs)
• UPS and backup power systems
• Commercial electrical infrastructure
• Renewable energy and battery storage systems
• Control panels and OEM equipment
• High fault-current environments
• Manufacturing and processing facilities