AJT12 - 12 Amp Fuse

AJT12 - 12 Amp Fuse

The AJT12 Class J Time-Delay Fuse is built for your electrical systems that need dependable protection without unnecessary downtime. In many commercial and industrial applications, motors and transformers create temporary startup surges that can cause standard fuses to open too quickly. The AJT12 is designed to handle those short inrush currents while still providing fast response during overloads and short circuits. That makes it a solid choice for keeping your equipment protected and operations running smoothly.

Its compact Class J design is especially useful in crowded panels where saving space matters. The built-in SmartSpot® indicator also makes maintenance easier by giving technicians a quick visual sign when the fuse has opened. Instead of wasting time troubleshooting, crews can identify the issue faster and get systems back online sooner. With strong current-limiting protection and a high interrupting rating, the AJT12 helps reduce the amount of fault energy moving through the system, helping you protect wiring, motors, and connected equipment from more serious damage.

Key Features and Benefits

• Time-delay design helps reduce nuisance openings during startup currents: Allows temporary inrush currents to pass without unnecessary interruptions.
• Current-limiting protection helps reduce damage during fault conditions: Helps minimize thermal and mechanical stress on connected electrical equipment.
• SmartSpot® visual indicator allows faster fuse identification during maintenance: Helps technicians quickly locate and replace opened fuses.
• Compact Class J footprint helps save panel space: Fits well into installations where enclosure space is limited.
• Suitable for AC and DC applications: Compatible with a variety of electrical distribution systems.
• High 200 kA interrupting capacity for demanding systems: Provides dependable protection in high fault-current environments.
  

Technical Specifications

• Catalog Number: AJT12
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 12 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 Style: Clip Mount
  
• Terminal Type: Ferrule
  
• Terminal Material: Tin-Plated Copper
  
• 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 AJT12 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 AJT12 works well in HVAC systems, industrial machinery, motor control centers, transformers, control panels, feeder circuits, and branch circuit applications where temporary startup surges are expected but reliable overcurrent protection is still critical.