AJT450 - 450 Amp Fuse

AJT450 - 450 Amp Fuse

The AJT450 Class J Time-Delay Fuse is made for your electrical systems that deal with heavy startup currents from motors, transformers, and large industrial equipment. When this kind of equipment starts up, it’s normal for the system to see a temporary spike in current. The AJT450 is designed to handle those short surges without opening too quickly, while still protecting the circuit if an overload or short circuit happens.

Its compact Class J size helps you save space inside electrical panels and switchboards, making it easier to work with in tighter installations. The fuse also provides current-limiting protection, helping reduce the amount of fault current moving through the system during a fault condition. That can help you reduce damage to wiring, controls, and connected equipment.

Another helpful feature is the built-in SmartSpot® visual indicator. When the fuse opens, technicians can quickly spot which fuse needs attention without spending extra time troubleshooting the system.

The AJT450 is commonly used in commercial and industrial power distribution systems where dependable overcurrent protection is needed every day. Its combination of time-delay performance, compact sizing, and high interrupting capacity makes it a practical fit for demanding electrical applications.

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 installations where electrical enclosure space is limited.
• SmartSpot® visual indicator helps identify opened fuses quickly: Helps simplify troubleshooting and maintenance.
• High interrupting capacity for demanding electrical systems: Designed for commercial and industrial applications requiring dependable fault protection.
• Suitable for AC and DC applications: Supports a wide range of electrical system requirements.
• Blade-style terminals support secure installation: Helps maintain dependable electrical connections.
• Commonly used in commercial and industrial electrical systems: Designed for reliable everyday overcurrent protection.
  

Technical Specifications

• Catalog Number: AJT450
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 450 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 AJT450 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 AJT450 is commonly installed in motor control centers, HVAC systems, industrial machinery, transformers, switchboards, feeder circuits, branch circuits, and commercial power distribution systems where temporary startup surges are expected during normal operation.