AJT90 - 90 Amp Fuse

AJT90 - 90 Amp Fuse

The AJT90 Class J Time-Delay Fuse is built for your electrical systems that need reliable overcurrent protection without unnecessary shutdowns during startup. Rated at 90 amps, this fuse is commonly used with motors, transformers, HVAC equipment, and industrial machinery where temporary inrush currents are part of normal operation. Its time-delay design helps you handle those short startup surges while still providing fast protection if a real overload or short circuit occurs.

One thing that makes the AJT90 a practical option is its compact Class J size. It takes up less panel space than many traditional fuse styles, which can help in crowded control panels and electrical cabinets. The built-in SmartSpot® indicator also makes maintenance easier by providing a quick visual sign when the fuse has opened, helping technicians identify problems faster and reduce downtime.

The AJT90 also includes current-limiting protection to help reduce the amount of fault energy passing through the system during a short circuit. This can help protect connected equipment, wiring, and electrical components from more serious damage. With a 200 kA interrupting rating and support for both AC and DC applications, the fuse works well in demanding commercial and industrial environments where dependable protection is important every day.

Key Features and Benefits

• Time-delay design: Helps reduce nuisance openings during startup currents.
• Current-limiting protection: Helps minimize damage during fault conditions.
• SmartSpot® visual indicator: Allows quick identification of an open fuse.
• Compact Class J construction: Helps save panel space.
• Suitable for AC and DC applications: Supports a variety of electrical systems.
• High 200 kA interrupting capacity: Designed for demanding electrical systems.
• Blade-style terminals: Support secure installation.
• IEC Type 2 “No Damage” support: Helps support coordinated protection when properly applied.
• Commercial and industrial use: Commonly used in commercial and industrial electrical systems.
  

Technical Specifications

• Catalog Number: AJT90
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 90 Amps
  
• Voltage Rating (AC): 600 VAC
  
• Voltage Rating (DC): 400 VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: Class J
  
• Characteristic: Time Delay
  
• Interrupting Rating: 200 kA
  
• Terminal Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Style: Clip or Bolted
  
• Indication System: SmartSpot® Visual Open Fuse Indicator
  
• Product Diameter: 27 mm
  
• Product Length: 117.6 mm
  
• Body Material: GMG
  
• Product Weight: 0.1093 kg
  

Material Compliance and Certifications

• Industry Standards: The AJT90 fuse is designed for Low Voltage UL/CSA applications and is intended for use in commercial and industrial electrical systems. When properly coordinated within a system, it supports IEC Type 2 “No Damage” protection requirements.
  

Where It Works Best

• The AJT90 is commonly installed in HVAC equipment, motor control centers, industrial machinery, transformers, feeder circuits, branch circuits, and electrical distribution panels where startup surges are expected but reliable overcurrent protection is still required.
  
• For facilities that need dependable circuit protection and efficient use of panel space, the AJT90 offers a practical solution for everyday commercial and industrial electrical applications.