AJT9 - 9 Amp Fuse

AJT9 - 9 Amp Fuse

The AJT9 Class J Time-Delay Fuse is a solid choice for your protecting electrical systems that deal with normal startup surges from motors, transformers, and similar equipment. Rated at 9 amps, this fuse is built to handle temporary inrush currents without opening unnecessarily, helping you keep equipment running during startup while still protecting the circuit if an overload or short circuit occurs.

Its compact Class J design makes it useful in panels and control cabinets where space is limited. Since it takes up less room than many standard fuse types, the AJT9 works well in modern commercial and industrial electrical systems where efficient panel layout matters. The built-in SmartSpot® indicator also helps you simplify maintenance by giving a quick visual sign when the fuse has opened, making troubleshooting faster for technicians.

The AJT9 uses current-limiting technology to help reduce the amount of fault energy moving through the system during a short circuit. That can help limit damage to connected equipment, wiring, and electrical components. With a 200 kA interrupting rating and support for both AC and DC applications, this fuse is commonly used in systems where reliable overcurrent protection is needed every day.

Key Features and Benefits

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

Technical Specifications

• Catalog Number: AJT9
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 9 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
  
• Terminal Type: Ferrule
  
• Terminal Material: Tin-Plated Copper
  
• Mounting Style: Clip
  
• Indication System: SmartSpot® Visual Open Fuse Indicator
  
• Product Diameter: 20.7 mm
  
• Product Length: 57.2 mm
  
• Body Material: GMG
  
• Product Weight: 0.044 kg
  

Material Compliance and Certifications

• Industry Standards: The AJT9 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 AJT9 is commonly installed in HVAC equipment, motor control centers, industrial machinery, transformers, feeder circuits, branch circuits, and electrical control panels where startup surges are expected but reliable overcurrent protection is still necessary.
  
• For facilities that need dependable circuit protection in a compact design, the AJT9 provides a practical solution for everyday commercial and industrial applications.