JJN-40 - 40Amp Fuse

JJN-40 - 40Amp Fuse

A compact fuse still has very specific requirements. The Eaton Bussmann series JJN-40 is a 40A Class T fuse rated for 300VAC and 160VDC, with interrupting ratings of 200 kAIC at 300VAC and 20 kAIC at 160VDC. For maintenance teams, electricians, and equipment owners looking for a JJN-40 replacement, the practical approach is simple: compare the fuse class, amperage, voltage, interrupting ratings, connection style, and dimensions with your equipment requirements. It’s built to last and provides clearly documented specifications to work from, instead of relying on appearance or assumptions.

Key Features and Benefits

• 40A Class T fuse with a clearly defined current rating for compatibility checks.
• 300VAC and 160VDC ratings support applications requiring the corresponding documented AC or DC rating.
• Ferrule end x ferrule end connection makes the required connection configuration easy to identify.
• Non-indicating design for applications where this fuse configuration is specified.

Technical Specifications

• Product Name: Eaton Bussmann Series JJN Fuse
  
• Catalog Number: JJN-40
  
• Product Type: Fuse
  
• Fuse Class: Class T
  
• Amperage Rating: 40A
  
• AC Voltage Rating: 300VAC
  
• DC Voltage Rating: 160VDC
  
• AC Interrupt Rating: 200 kAIC at 300VAC
  
• DC Interrupt Rating: 20 kAIC at 160VDC
  
• Connection: Ferrule End x Ferrule End
  
• Fuse Indicator: Non-Indicating
  
• Length/Depth: 0.88 in.
  
• Height: 0.56 in.
  
• Width: 0.56 in.
  
• Product Weight: 0.2 lb.
  
• UPC: 051712627405
  

Material Compliance and Certifications

The supplied specifications identify the JJN-40 as CE-marked and RoHS-compliant. These are the compliance designations documented for this catalog number.

No UL, CSA, REACH, or other certification information was supplied for the JJN-40, so do not assume those designations based on other products in the JJN family.

Where It Works Best

The JJN-40 40A Class T fuse suits compatible electrical equipment that specifically calls for its 40A current rating, 300VAC or 160VDC voltage rating, corresponding interrupting capacity, ferrule-to-ferrule connection, non-indicating configuration, and physical dimensions. Those details are especially useful when replacing a fuse in existing equipment, where you must confirm both electrical compatibility and physical fit.