FRS-R-400 - 400Amp Fuse

FRS-R-400 - 400Amp Fuse

Replacing an FRS-R-400 fuse? The 400-amp rating is the obvious place to start, but it shouldn't be the only thing you check. Connection is easy to identify: this model has blade ends on both sides. It's also non-indicating, so there isn't a built-in indicator showing fuse status. Size is another detail worth checking. The FRS-R-400 measures 11.63 inches long by 2.59 inches high by 2.59 inches wide. If you're replacing an existing fuse, compare the full specification—not just the 400A marking—with the equipment's requirements.

Key Features and Benefits

• 400A Class RK5 fuse: Gives you two important specifications to check right away when matching a replacement.
• 600 VAC / 300 VDC ratings: Clearly defined AC and DC voltage ratings help with equipment compatibility checks.
• Dual-element design: Matches the manufacturer's specified element configuration for the FRS-R-400.
• 10-second response specification: Manufacturer-rated response time is 10 seconds at 500% of rated current.
• Blade connections: Blade-end-to-blade-end configuration makes the connection style straightforward to verify.
• Non-indicating: This model lacks a built-in fuse-status indicator.
  

Technical Specifications

• Product Name: Eaton Bussmann series FRS-R fuse
  
• Catalog Number: FRS-R-400
  
• UPC: 051712508537
  
• Product Type: Fuse
  
• Class: Class RK5
  
• Amperage Rating: 400 A
  
• AC Voltage Rating: 600 VAC
  
• DC Voltage Rating: 300 VDC
  
• AC Interrupt Rating: 200 kAIC at 600 VAC
  
• DC Interrupt Rating: 20 kAIC at 300 VDC
  
• Response Time: 10 sec at 500%
  
• Number of Elements: Dual
  
• Connection: Blade end x blade end
  
• Fuse Indicator: Non-indicating
  
• Product Length/Depth: 11.63 in
  
• Product Height: 2.59 in
  
• Product Width: 2.59 in
  
• Product Weight: 0.001 lb
  

Material Compliance and Certifications

According to the supplied manufacturer information, the FRS-R-400 is CE-marked. No additional certifications or material compliance declarations were included in the provided specifications, so none are claimed here.

Where It Works Best

The FRS-R-400 400A fuse makes sense for compatible electrical equipment specifically requiring a Class RK5 dual-element fuse with blade connections and ratings matching this model. With 600 VAC and 300 VDC ratings, plus separately specified AC and DC interrupt ratings, there are several concrete details you can compare with the equipment documentation.