Mersen

A6T300 - 300 Amp Fuse

A6T300 - 300 Amp Fuse

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A6T300 - 300 Amp Fuse

The A6T300 Class T Fast-Acting Fuse is built to protect your electrical systems quickly and reliably. If you need a fuse that can handle high currents without taking up too much space, this 300A fuse is a perfect fit. It works in both AC and DC applications, up to 600VAC or 300VDC, and is designed to stop overloads and short circuits before they cause damage. Its compact design makes it easy to fit into panels, while the stamped blade markings make identification and replacement simple. Made with a durable glass melamine body, the A6T300 keeps its shape and performance over time, even in demanding environments. With an interrupting rating of 200kA, it can handle heavy fault currents, giving you confidence that your equipment and circuits are well protected.

Key Features and Benefits

  • Fast Response: Protects circuits immediately during overloads or short circuits.
  • High Fault Capacity: Handles fault currents up to 200kA.
  • Space-Saving Design: Compact Class T shape fits into tighter panels.
  • Reliable 300A Rating: Provides steady protection for high-current applications.
  • Versatile Voltage Support: Works with both AC and DC circuits.
  • Secure Blade Terminals: Copper connections ensure good conductivity and a solid mount.
  • Durable Body: Glass melamine keeps the fuse stable and long-lasting.
  • Easy Identification: Blade markings make it simple to check or replace.

Technical Specifications

  • Catalog Number: A6T300
  • Product Type: Class T Fast-Acting Fuse
  • Ampere Rating: 300A
  • Voltage Rating AC: 600VAC
  • Voltage Rating DC: 300VDC
  • Frequency: 50/60 Hz
  • Fuse Class: Class T
  • Fuse Speed: Fast-Acting
  • Interrupting Rating: 200kA AC
  • Mounting Type: Bolted
  • Terminal Type: Blade
  • Terminal Material: Copper
  • Body Material: GMG (Glass Melamine)
  • Product Diameter: 41.1 mm
  • Product Length: 91.9 mm
  • Product Weight: 0.2286 kg

Material Compliance and Certifications

  • The A6T300 meets UL and CSA low-voltage standards, making it a trusted choice for electrical safety. Its Class T construction ensures reliable performance in protecting circuits from high fault currents.

Where It Works Best

  • Motor control centers
  • Power panels
  • UPS systems
  • Battery storage
  • Industrial machinery

It’s perfect for spaces where every inch counts but safety can’t be compromised. Quick-acting and dependable, the A6T300 keeps your equipment running smoothly without surprises.


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Mersen® is a registered trademark of Mersen S.A. Products sold are surplus, used, or refurbished and are NOT supplied by Mersen S.A. or its affiliates.

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