A4J80 - 80 Amp Fuse

A4J80 - 80 Amp Fuse

If your electrical systems take a beating in busy commercial and industrial environments, and when a fault happens, quick protection matters. The Mersen A4J80 Amp-Trap® Class J Fast-Acting Fuse is built to react fast during overloads and short circuits, helping you protect valuable equipment before damage spreads through the system. Rated at 80 amps, this fuse is a dependable choice for applications where minimizing downtime and protecting electrical components are both priorities.

The A4J80 uses fast-acting, current-limiting technology to help reduce the amount of damaging fault current moving through the circuit. That fast response can help protect motors, transformers, HVAC systems, industrial control panels, and other sensitive equipment from excess stress during electrical faults. In facilities where production depends on reliable electrical performance, having dependable overcurrent protection in place can help keep your operations running smoothly.

Another feature that makes the A4J80 practical for everyday use is its Class J rejection-style design. This helps prevent lower-rated fuses from being installed by mistake, helping you maintain proper system protection and supporting safer maintenance practices. The blade-style terminals provide secure installation in compatible fuse holders, while the GMG body material is designed for long-term use in demanding operating environments.

With a 600VAC / 300VDC rating and a high 200 kA interrupting capacity, the Mersen A4J80 delivers the fast fault interruption and reliable protection electrical professionals rely on for commercial and industrial power systems.

Key Features and Benefits

• 80 amp Class J fast-acting fuse: Designed for rapid response during overloads and short circuits.
• Current-limiting design: Helps reduce equipment damage.
• Electrical system protection: Helps improve electrical system safety and reliability.
• Class J rejection-style construction: Helps prevent incorrect replacement.
• High 200 kA interrupting rating: Designed for demanding fault-current conditions.
• Suitable for AC and DC applications: Supports commercial and industrial electrical systems.
• Blade terminal design: Provides secure installation.
• Silver-plated copper terminals: Provide dependable conductivity.
• Durable GMG body: Designed for industrial and commercial environments.
• ROHS compliant: Supports environmental compliance requirements.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A4J80
  
• Series: Amp-Trap® A4J
  
• Fuse Class: Class J
  
• Fuse Type: Fast-Acting
  
• Amp Rating: 80A
  
• Voltage Rating: 600VAC / 300VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Current Type: AC/DC
  
• Mounting Style: Clip
  
• Terminal Type: Blade
  
• Terminal Material: Silver-Plated Copper
  
• Body Material: GMG
  
• Product Diameter: 27 mm
  
• Product Length: 117.6 mm
  
• Product Weight: 0.1089 kg
  
• UPC/EAN: 782001960308
  

Material Compliance and Certifications

• ROHS Compliant: Designed for Low Voltage UL/CSA fuse applications.
• Suitable for industrial and commercial electrical systems: Supports dependable overcurrent protection.
  

Where It Works Best

• The A4J80 works well in industrial machinery, HVAC systems, motor control applications, branch circuits, OEM equipment, manufacturing facilities, and electrical distribution systems where fast overcurrent protection is important. It is especially useful in applications with sensitive electrical components that require quick interruption during overloads and short-circuit conditions to help reduce equipment damage and minimize downtime.