AJT600 - 600 Amp Fuse

AJT600 - 600 Amp Fuse

When you’re working with large electrical systems, nuisance fuse openings are the last thing you want slowing things down. The AJT600 Class J Time-Delay Fuse is designed for equipment that naturally creates temporary startup surges — like motors, transformers, compressors, and industrial machinery. Instead of opening during those normal startup conditions, the AJT600 is built to ride through short bursts of extra current while still helping protect the system if a real overload or short circuit happens.

That’s one reason these fuses are commonly used in commercial and industrial facilities where equipment runs hard every day. The time-delay protection helps keep systems operating smoothly, while the current-limiting design helps reduce the amount of fault current that can pass through the circuit during a fault condition. In many cases, that can help limit damage to connected wiring, controls, and expensive equipment.

Another advantage is the compact Class J footprint. Compared to larger fuse styles, the AJT600 takes up less space inside switchboards and electrical panels, which can make installations cleaner and easier to manage. The built-in SmartSpot® visual indicator also makes maintenance simpler by helping technicians quickly identify when a fuse has opened.

Whether it’s protecting industrial machinery, HVAC systems, motor control centers, or large power distribution equipment, the AJT600 is made for systems where dependable overcurrent protection matters every day.

Key Features and Benefits

• Time-delay design helps reduce nuisance openings during startup currents: Helps allow temporary startup surges without unnecessary fuse openings.
• Current-limiting protection helps reduce damage during fault conditions: Helps reduce fault current moving through the system during short circuits.
• Compact Class J size helps save panel space: Useful for tighter electrical panels and switchboards.
• SmartSpot® visual indicator helps identify opened fuses quickly: Helps technicians locate opened fuses faster during maintenance.
• High interrupting capacity for heavy-duty electrical systems: Designed for demanding commercial and industrial applications.
• Suitable for AC and DC applications: Supports a variety of electrical system requirements.
• Blade-style terminals support secure installation: Helps provide dependable electrical connections.
• Commonly used in commercial and industrial power distribution systems: Suitable for a wide range of electrical protection applications.
  

Technical Specifications

• Catalog Number: AJT600
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 600 Amps
  
• Voltage Rating (AC): 600 VAC
  
• Voltage Rating (DC): 500 VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: Class J
  
• Characteristic: Time Delay
  
• Interrupting Rating: 200 kA
  
• Mounting Type: Clip or Bolted
  
• Terminal Type: Blade
  
• Terminal Material: Brass
  
• Indication System: SmartSpot® Visual Indicator
  
• Body Material: GMG
  
• Product Diameter: 63.5 mm
  
• Product Length: 203.2 mm
  
• Product Weight: 1.3698 kg
  

Material Compliance and Certifications

• Industry Standards: The AJT600 fuse is designed for low-voltage UL and CSA applications and supports IEC Type 2 “No Damage” protection requirements when properly coordinated within electrical systems.
  

Where It Works Best

• The AJT600 is commonly installed in industrial machinery, motor control centers, HVAC systems, transformers, switchboards, feeder circuits, branch circuits, and commercial power distribution systems where temporary startup surges are expected during normal operation.