AJT250 - 250 Amp Fuse

AJT250 - 250 Amp Fuse

The AJT250 Class J Time-Delay Fuse is built for your electrical systems that see heavy startup loads during normal operation. Motors, transformers, compressors, and HVAC equipment can all draw a temporary surge of current when starting up. Instead of opening during those short bursts, the AJT250 is designed to handle normal inrush currents while still providing reliable protection if a short circuit or overload happens.

Its compact Class J design helps save space inside electrical panels and switchboards, making it a good fit for tighter installations. The fuse also provides current-limiting protection, helping reduce the amount of fault current that can pass through the system during a fault condition. That added protection can help reduce damage to connected equipment, wiring, and electrical components.

The SmartSpot® visual indicator makes maintenance more straightforward as well. When the fuse opens, the indicator provides a clear visual signal so technicians can quickly identify the affected fuse and reduce troubleshooting time.

The AJT250 is commonly used in commercial and industrial electrical systems where dependable overcurrent protection is needed every day. Its time-delay performance, high interrupting capacity, and space-saving design make it a practical choice for a wide range of power distribution applications.

Key Features and Benefits

• Time-delay design helps prevent 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 systems.
• Compact Class J size helps save panel space: Fits well into installations where enclosure space is limited.
• SmartSpot® visual indicator allows quick fuse identification: Helps maintenance teams quickly locate opened fuses.
• High interrupting capacity for demanding electrical systems: Suitable for commercial and industrial high fault-current environments.
• Suitable for AC and DC applications: Compatible with a variety of electrical distribution systems.
• Blade-style terminals support secure installation: Helps provide dependable electrical connections and fit.
  

Technical Specifications

• Catalog Number: AJT250
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 250 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: 54 mm
  
• Product Length: 181.1 mm
  
• Product Weight: 0.8119 kg
  

Material Compliance and Certifications

• Industry Standards: The AJT250 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 AJT250 is commonly installed in motor control centers, HVAC systems, industrial machinery, transformers, switchboards, feeder circuits, branch circuits, and other commercial power distribution systems where temporary startup surges are expected during normal operation.