JJN-400 - 400Amp Fuse

JJN-400 - 400Amp Fuse

When you’re dealing with a 400-amp Class T fuse, the name on the label is only the beginning—you also need the electrical ratings, connection style, and physical size to match the equipment. The Eaton Bussmann series JJN-400 is rated at 400A, 300VAC, and 160VDC, with an interrupting rating of 200 kAIC at 300VAC and 20 kAIC at 160VDC. It’s built to last and provides a clearly documented set of specifications for electrical maintenance and replacement work.

Key Features and Benefits

• 400A Class T fuse with clearly identified electrical ratings for easier application verification.
• Rated for 300VAC and 160VDC, allowing compatibility to be checked against the applicable AC or DC system requirements.
• Bolted blade-end x bolted blade-end connection provides a defined physical connection configuration to verify against existing equipment.
• Non-indicating design for equipment specifying this fuse configuration.

Technical Specifications

• Product Name: Eaton Bussmann Series JJN Fuse
  
• Catalog Number: JJN-400
  
• Product Type: Fuse
  
• Fuse Class: Class T
  
• Amperage Rating: 400A
  
• AC Voltage Rating: 300VAC
  
• DC Voltage Rating: 160VDC
  
• AC Interrupt Rating: 200 kAIC at 300VAC
  
• DC Interrupt Rating: 20 kAIC at 160VDC
  
• Connection: Bolted Blade End x Bolted Blade End
  
• Fuse Indicator: Non-Indicating
  
• Length/Depth: 2.75 in.
  
• Height: 1 in.
  
• Width: 1 in.
  
• Product Weight: 0.25 lb.
  
• UPC: 051712627047
  

Material Compliance and Certifications

The supplied manufacturer specifications identify the JJN-400 as CE-marked and RoHS-compliant. These are the compliance designations documented for this specific catalog number.

No UL, CSA, REACH, or additional certification information was provided for the JJN-400. Do not assume those designations simply because they may appear on other products in the same fuse family.

Where It Works Best

The JJN-400 400A Class T fuse is best suited to compatible electrical equipment requiring its specific combination of 400A amperage, 300VAC or 160VDC voltage rating, corresponding interrupting capacity, bolted-blade connection, non-indicating configuration, and 2.75 x 1 x 1-inch dimensions. That makes it a straightforward product to evaluate when servicing existing equipment where the required fuse specifications are already known.