A4BT750 - 750 Amp Fuse

A4BT750 - 750 Amp Fuse

The Mersen A4BT750 Amp-Trap® Class L fuse is designed for electrical systems that see heavy loads and demanding operating conditions. With a 750 amp rating and time-delay protection, it helps you prevent unnecessary fuse openings during equipment startup while still protecting your circuits from serious overloads and short circuits. It’s a common choice for large motors, feeders, transformers, and other high-current applications where dependable protection is important.

This fuse is built to handle the kind of temporary inrush currents that happen when large equipment powers on. Instead of opening immediately during those brief surges, the A4BT750 allows normal startup conditions to pass while staying ready to react during real fault situations. Its current-limiting design also helps reduce the amount of energy let through during a short circuit, helping you protect connected equipment from additional damage.

The A4BT750 features silver-plated copper blade terminals for solid electrical contact and a bolted mounting design for a secure installation. Rated for both 600VAC and 500VDC systems, it can be used across a wide range of industrial and commercial applications.

Key Features and Benefits

• 750A Class L time-delay fuse
• Designed for industrial and commercial power systems
• Helps reduce nuisance openings caused by startup currents
• Current-limiting protection helps minimize equipment damage during faults
• 200 kA interrupting rating for high fault current applications
• Rated for 600VAC and 500VDC systems
• Silver-plated copper blade terminals for reliable conductivity
• Bolted mounting design for secure installation
• Suitable for mains, feeders, transformers, and motor circuits

Technical Specifications

• Catalog Number: A4BT750
  
• Series: A4BT – Class L – Time-Delay
  
• Fuse Class: Class L
  
• Ampere Rating: 750A
  
• Voltage Rating: 600VAC / 500VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Fuse Type: Time-Delay Current-Limiting Fuse
  
• Mounting Type: Bolted
  
• Connection Type: Blade
  
• Terminal Material: Silver-Plated Copper
  
• Body Material: GMG
  
• Product Length: 219.2 mm
  
• Product Diameter: 76.2 mm
  
• Product Weight: 1.6919 kg
  

Material Compliance and Certifications

• RoHS Compliant
• Designed for low-voltage UL applications
• Compatible with AC and DC systems
  

Where It Works Best

• The Mersen A4BT750 is often used in motor control centers, industrial machinery, switchboards, commercial buildings, HVAC equipment, and power distribution systems where large startup loads are common. Its time-delay characteristics make it especially useful in applications where motors and transformers draw higher inrush current during startup.