TR400R - 400 Amp Fuse

TR400R - 400 Amp Class R Fuse

The TR400R Class R fuse is a solid choice for your protecting high-amperage electrical systems in commercial and industrial settings. Rated for 400 Amps, this time-delay fuse is designed to handle the temporary power surges that happen when motors, transformers, and similar equipment start up, while still protecting circuits from overloads and short circuits. Its knife-blade design provides a secure connection, and the current-limiting construction helps reduce the amount of damage a fault can cause to connected equipment. With a 200 kA interrupting rating at 250 VAC, the TR400R is built for applications where dependable circuit protection is important day in and day out. Whether it’s used in a distribution panel, motor control center, or heavy electrical equipment, the TR400R helps keep systems protected and running with fewer interruptions.

Key Features and Benefits

• 400 Amp Class R Fuse: Designed for industrial and commercial power systems requiring dependable overcurrent protection.
• Time-Delay Operation: Helps prevent unnecessary fuse openings during startup surges caused by motors, transformers, and similar equipment.
• Current-Limiting Protection: Helps reduce equipment damage during faults by limiting the amount of fault current that passes through the circuit.
• Knife-Blade Style Design: Provides a secure installation and dependable electrical connection.
• High Interrupting Rating: Rated for 200 kA at 250 VAC for demanding commercial and industrial applications.
• Compact Construction: Compact size allows use in compatible electrical equipment and distribution systems.
  

Technical Specifications

• Part Number: TR400R
  
• Type: TR
  
• Fuse Class: Class R
  
• Amperage: 400A
  
• Voltage Rating: 250 VAC
  
• Interrupting Capacity: 200 kA @ 250 VAC
  
• Operation Type: Time-Delay
  
• Style: Knife-Blade
  
• Indication: Non-Indicating
  
• Dimensions:
  • Height: 8.63 in.
  • Width: 2.0 in.
  • Depth: 2.0 in.
• Ship Weight: N/A
  

Material Compliance and Certifications

• Application Compliance: The TR400R is designed for low-voltage overcurrent protection applications commonly found in commercial and industrial electrical systems. Class R fuses are widely used where reliable circuit protection and current limitation are required.
• Installation Compatibility: Always verify application requirements and equipment compatibility before installation.
  

Where It Works Best

• The TR400R works well in motor control centers, switchboards, HVAC systems, industrial machinery, transformers, and electrical distribution equipment. Its time-delay performance makes it especially useful in systems that experience temporary inrush currents during equipment startup.