A3T20 - 20Amp Fuse

A3T20 - 20Amp Fuse

The Mersen A3T20 is a fast-acting Class T fuse designed to help you protect the electrical equipment from overloads and short circuits before damage occurs. With a 20 amp rating and compact design, it’s a practical option for commercial and industrial systems where dependable circuit protection matters and panel space is limited.

This fuse is built for applications that need quick response during fault conditions. Its high current-limiting capability helps reduce the amount of energy passing through the circuit, which can help protect connected equipment and minimize downtime. The compact footprint also makes installation easier in tighter electrical enclosures and distribution equipment.

Mersen designed the A3T20 with a glass melamine body for added durability and dimensional stability. The ferrule-style terminals allow for secure clip mounting, and the fuse markings are permanently stamped for easier identification during maintenance or replacement. Rated for 300VAC and 160VDC, the A3T20 works well in a variety of power distribution and control applications.

Key Features and Benefits

• Fast-acting protection for overloads and short circuits
• 20 amp Class T fuse for commercial and industrial use
• Compact design helps save space inside panels and equipment
• High current limitation helps protect sensitive components
• 300VAC and 160VDC rated for AC and DC applications
• 200 kA interrupting rating for demanding fault conditions
• Ferrule terminals for secure clip mounting
  

Technical Specifications

• Catalog Number: A3T20
  
• Manufacturer: Mersen
  
• Series: A3T – Class T – Fast-Acting
  
• Fuse Class: Class T
  
• Amp Rating: 20A
  
• Voltage Rating (AC): 300VAC
  
• Voltage Rating (DC): 160VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Terminal Type: Ferrule
  
• Mounting Type: Clip Mount
  
• Terminal Material: Copper
  
• Body Material: GMG Glass Melamine
  
• Diameter: 10.4 mm
  
• Length: 22.4 mm
  
• Weight: 0.0054 kg
  
• UPC/EAN: 782001890070
  

Material Compliance and Certifications

• RoHS Compliant
• Suitable for UL applications
• Designed for low-voltage UL/CSA fuse systems
  

Where It Works Best

• The A3T20 fuse is commonly used in:
• Industrial control panels
• Power distribution equipment
• HVAC systems
• Motor control circuits
• Transformers and power supplies
• Commercial electrical systems
• Renewable energy equipment
• Sensitive electronic applications
• For applications that require fast fault protection in a compact format, the Mersen A3T20 provides reliable performance for everyday electrical system protection.