AJT175 - 175 Amp Fuse

AJT175 - 175 Amp Fuse

Electrical systems don’t always run under perfect conditions — motors surge at startup, transformers draw heavy inrush currents, and sensitive equipment needs dependable protection every second of the day. That’s where the AJT175 Class J Time-Delay Fuse delivers real value. Built as part of the trusted Amp-Trap 2000® series, this 175 amp fuse is engineered to protect your commercial and industrial electrical systems from damaging overcurrents while still allowing temporary startup surges to pass without unnecessary fuse openings.

What sets the AJT175 apart is its ability to combine fast-acting current limitation with time-delay performance in a compact Class J footprint. In practical terms, that means better protection for your motors, transformers, feeders, and branch circuits — all while saving valuable panel space compared to larger fuse classes. The built-in SmartSpot® visual indicator also makes maintenance easier by giving technicians a quick visual confirmation when the fuse has opened, helping reduce troubleshooting time and keeping downtime to a minimum.

From manufacturing plants and HVAC systems to control panels and industrial automation equipment, this fuse is designed to perform in environments where reliability isn’t optional.

Key Features and Benefits

• Time-delay performance helps prevent nuisance fuse openings during motor startups and transformer inrush currents: Allows temporary startup surges to pass without unnecessary interruptions.
• High current-limiting capability helps reduce damage caused by short circuits and fault currents: Helps minimize thermal and mechanical stress on connected electrical systems.
• SmartSpot® visual open-fuse indicator simplifies maintenance and speeds up troubleshooting: Helps maintenance teams quickly identify opened fuses.
• Compact Class J design uses less mounting space inside electrical panels and switchgear: Fits well into installations where enclosure space is limited.
• Helps support IEC Type 2 “No Damage” coordinated protection requirements when properly applied: Supports coordinated protection strategies within electrical systems.
• 200 kA interrupting rating provides dependable protection in high fault-current environments: Suitable for demanding commercial and industrial applications.
• Suitable for both AC and DC applications: Compatible with a variety of electrical distribution systems.
  

Technical Specifications

• Catalog Number: AJT175
  
• Product Series: AJT – Class J – Time-Delay
  
• Product Type: Amp-Trap 2000® Fuse
  
• Ampere Rating: 175 Amps
  
• AC Voltage Rating: 600 VAC
  
• DC Voltage Rating: 500 VDC
  
• Frequency: 50/60 Hz
  
• Fuse Class: Class J
  
• Characteristic: Time Delay
  
• Interrupting Rating: 200 kA
  
• Mounting Options: Clip or Bolted
  
• Indication Type: SmartSpot® Visual Indicator
  
• Terminal Type: Blade
  
• Terminal Material: Brass
  
• Product Diameter: 41.3 mm
  
• Product Length: 146 mm
  
• Body Material: GMG
  
• Product Weight: 0.3465 kg
  
• UPC / EAN: 782001962579
  

Material Compliance and Certifications

• Industry Standards: The AJT175 fuse is manufactured for low-voltage UL and CSA electrical applications and is designed to meet demanding commercial and industrial protection requirements.
• Performance Characteristics: Its advanced construction supports reliable overcurrent protection and coordinated system performance in applications requiring IEC Type 2 “No Damage” protection.
  

Where It Works Best

• The AJT175 Class J time-delay fuse is an excellent fit for applications where temporary power surges are common but dependable circuit protection is critical. It’s frequently used in motor control centers, industrial machinery, HVAC equipment, transformers, feeder circuits, branch circuits, automation systems, manufacturing facilities, and commercial electrical distribution panels.