AJT70 - 70 Amp Fuse

AJT70 - 70 Amp Fuse

The AJT70 Class J Time-Delay Fuse is built for your electrical systems that see regular startup surges but still need dependable overcurrent protection every day. Rated at 70 amps, this Amp-Trap 2000® fuse is commonly used in commercial and industrial equipment where motors, transformers, and HVAC systems create temporary inrush currents during startup. Instead of opening unnecessarily during those brief surges, the AJT70 is designed to ride through them while still reacting quickly if a true overload or short circuit occurs.

One reason electricians and maintenance teams like the AJT70 is its compact Class J design. It takes up less space than many traditional fuse types, which can make a difference inside crowded panels and control equipment. The built-in SmartSpot® visual indicator also helps you speed up troubleshooting by making it easier to identify an opened fuse at a glance. In busy facilities, saving even a few minutes during maintenance can help reduce downtime and keep operations moving.

The AJT70 also delivers strong current-limiting protection, helping reduce the amount of fault energy that reaches connected equipment during a short circuit. That added protection can help you minimize damage to wiring, motors, and other electrical components. With a 200 kA interrupting rating and support for both AC and DC applications, this fuse is a practical choice for a wide range of power distribution and motor protection applications.

Key Features and Benefits

• Time-delay performance helps reduce nuisance fuse openings during equipment startup: Helps allow temporary startup surges without unnecessary fuse openings.
• Current-limiting protection helps minimize damage during fault conditions: Helps reduce fault energy during short circuits.
• SmartSpot® visual indicator makes blown fuses easier to identify: Helps simplify troubleshooting and maintenance.
• Compact Class J design helps save panel space: Useful in crowded electrical panels and control equipment.
• Suitable for both AC and DC electrical systems: Supports a wide range of applications.
• High 200 kA interrupting capacity for demanding applications: Built for commercial and industrial systems.
• Blade-style terminals support secure installation: Helps provide dependable electrical connections.
• Designed for feeder, branch circuit, and motor protection applications: Suitable for multiple power distribution uses.
• Helps support IEC Type 2 “No Damage” protection requirements when properly coordinated: Supports coordinated protection systems.
  

Technical Specifications

• Catalog Number: AJT70
  
• Series: AJT – Class J – Time-Delay
  
• Fuse Type: Amp-Trap 2000®
  
• Ampere Rating: 70 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 AJT70 fuse is manufactured for Low Voltage UL/CSA applications and is designed to meet the protection requirements commonly found in commercial and industrial electrical systems. When properly coordinated within a system, it can support IEC Type 2 “No Damage” protection requirements for improved equipment protection.
  

Where It Works Best

• The AJT70 is frequently installed in HVAC equipment, motor control centers, industrial machinery, transformers, feeder circuits, branch circuits, distribution panels, and electrical control systems where startup currents are expected but reliable overcurrent protection is still critical.