A3T1200 - 1200 Amp Fuse

A3T1200 - 1200 Amp Fuse

The Mersen A3T1200 Amp-Trap® Class T Fast-Acting Fuse is built for your electrical systems that need serious protection against overloads and short circuits. Rated for 1200 amps, this Class T fuse delivers fast response times and strong current-limiting performance to help protect equipment before damage can spread through the system. Its compact design also makes it a practical choice for installations where space inside the enclosure is limited.

Designed for both AC and DC applications, the A3T1200 carries a 300VAC and 160VDC rating along with a 200 kA interrupting capacity. That combination makes it a dependable option for demanding commercial and industrial environments where high fault currents are a concern. The fast-acting design helps you reduce downtime and can help you limit  costly repairs by clearing dangerous fault conditions quickly.

Mersen uses a glass melamine body for added dimensional stability and long-term durability. Copper blade terminals provide secure conductivity and reliable bolted connections, while permanent markings stamped into the blades make identification easier during maintenance or replacement. The fuse’s Class T construction also helps prevent the use of lower-rated substitutes, helping maintain proper system protection.

From power distribution equipment to UPS systems and industrial machinery, the A3T1200 is designed to deliver consistent performance in applications where reliability matters every day.

Key Features and Benefits

• Fast-acting Class T fuse for rapid overcurrent protection
• 1200A rating for high-capacity electrical systems
• High current-limiting performance helps reduce equipment damage
• Compact size helps save panel and enclosure space
• Rated for 300VAC and 160VDC applications
• 200 kA interrupting rating for high fault-current protection
• Glass melamine body supports durability and dimensional stability
• Copper blade terminals provide dependable electrical connections
• Blade-stamped catalog markings simplify identification and maintenance
• Helps prevent replacement with lower-rated fuse types
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A3T1200
  
• Product Type: Class T Fast-Acting Fuse
  
• Ampere Rating: 1200A
  
• Voltage Rating AC: 300VAC
  
• Voltage Rating DC: 160VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: Class T
  
• Speed: Fast-Acting
  
• Interrupting Rating: 200 kA
  
• Terminal Type: Blade
  
• Terminal Material: Copper
  
• Mounting Type: Bolted
  
• Body Material: GMG (Glass Melamine)
  
• Product Length: 4 in
  
• Product Diameter: 2.52 in
  
• Product Weight: 1.45 lb
  
• AC/DC Application: AC and DC
  

Material Compliance and Certifications

• RoHS Compliant
• UL Rated
• Designed for Low Voltage UL/CSA Fuse Applications
• Manufactured to meet industry standards for electrical safety and performance
  

Where It Works Best

• Switchboards
• Panelboards
• Motor control centers
• UPS and backup power systems
• Battery systems
• Industrial machinery
• Manufacturing facilities
• High-capacity power distribution equipment