TJN400 - 400Amp Fuse

TJN400 - 400 Amp Fuse

The TJN400 is a 400-amp Class T fuse designed to protect your electrical equipment from short circuits and overloads. Its very fast-acting response helps you to stop fault currents quickly, which can help reduce damage to connected components and better protect systems during electrical faults.

Built with a knife-blade style design, the TJN400 provides a solid connection in compatible fuse holders while taking up minimal space inside electrical panels and switchboards. With a 200 kA interrupting rating at 300 VAC, it’s commonly used in commercial and industrial power systems that require high-fault-current protection. The non-indicating design keeps installation and replacement simple for standard Class T fuse applications.

Key Features and Benefits

• 400 amp Class T fuse: Designed to provide overcurrent protection for electrical systems requiring a 400 amp fuse rating.
• Very fast-acting protection: Helps stop fault currents quickly to reduce potential damage to connected equipment during electrical faults.
• Current-limiting performance: Supports protection of electrical systems by limiting the amount of fault current that passes through the circuit.
• Knife-blade style construction: Provides a secure connection in compatible fuse holders while supporting reliable installation.
• Compact design for tighter spaces: Helps maximize available room inside electrical panels and switchboards where space may be limited.
• 200 kA interrupting rating at 300 VAC: Suitable for commercial and industrial systems requiring high fault-current protection capacity.
• Designed for commercial and industrial systems: Commonly used in power distribution equipment and other demanding electrical applications.
• Non-indicating fuse: Keeps installation and replacement straightforward for standard Class T fuse applications.
  

Technical Specifications

• Part Number: TJN400
  
• Type: Class T Fuse
  
• Series: TJN
  
• Amperage Rating: 400A
  
• Voltage Rating: 300 VAC
  
• A.I.C. Rating: 200 kA @ 300 VAC
  
• Style: Knife-Blade
  
• Indication: Non-Indicating
  
• Acting Speed: Very Fast-Acting
  
• Dimensions:
  • Height: 2.75 in.
  • Width: 1.312 in.
  • Depth: 1.312 in.

Material Compliance and Certifications

• Manufacturing Application: The TJN400 is manufactured for overcurrent protection applications requiring high interrupting capacity and fast response performance commonly associated with Class T fuses.
  

Where It Works Best

• This fuse is commonly used in switchboards, panelboards, motor control centers, transformers, industrial machinery, and power distribution equipment where fast fault protection is important.