JJS-400 - 400Amp Fuse

JJS-400 - 400Amp Fuse

When you’re replacing a fuse in existing electrical equipment, the useful question isn’t simply, “Is it 400 amps?” The complete specification matters. The Eaton Bussmann series JJS-400 is a 400A, 600V Class T fuse with a manufacturer-specified 200 kAIC interrupting rating at 600VAC. For an application that requires this combination of amperage, voltage, fuse class, interrupting rating, connection style, and dimensions, it provides a clear specification match. It’s built to last, but correct fuse selection should always start with the equipment's requirements—not appearance or amperage alone.

Key Features and Benefits

• 400A Class T configuration: Rated at 400 amps for compatible equipment specifically requiring this fuse class and amperage.
• 600V rating: Provides a clear voltage rating for accurate application matching.
• Bolted blade connections: Uses a bolted blade end x bolted blade end connection configuration.
• Non-indicating design: The fuse does not include an integral visual indicator of fuse status.
• Easy identification: Catalog number JJS-400 and UPC 051712628044 help technicians identify the exact component during replacement and maintenance.

Technical Specifications

• Product Name: Eaton Bussmann Series JJS Fuse
  
• Catalog Number: JJS-400
  
• Product Type: Fuse
  
• Fuse Class: Class T
  
• Amperage Rating: 400A
  
• Voltage Rating: 600V
  
• Interrupt Rating: 200 kAIC at 600VAC
  
• Connection: Bolted Blade End x Bolted Blade End
  
• Fuse Indicator: Non-Indicating
  
• Special Feature: Non-Indicating
  
• Product Length/Depth: 3.63 in.
  
• Product Height: 1 in.
  
• Product Width: 1 in.
  
• Product Weight: 0.5 lb.
  
• UPC: 051712628044
  

Material Compliance and Certifications

Manufacturer information lists the Eaton Bussmann JJS-400 as CE-marked and RoHS-compliant. RoHS compliance restricts specified hazardous substances used in electrical and electronic products.

Where It Works Best

The JJS-400 is best considered for compatible electrical equipment that requires a 400A, 600V Class T fuse with a 200 kAIC interrupting rating at 600VAC and a bolted blade-end-to-bolted blade-end connection. Its 3.63 x 1 x 1-inch dimensions are another important part of the compatibility check, particularly when replacing a fuse in existing equipment where the available mounting space and connection configuration are already established.