FRN-R-450 - 450Amp Fuse

FRN-R-450 - 450Amp Fuse

At 450 amps, the FRN-R-450 is a sizable Class RK5 fuse—and its physical dimensions reflect that. Eaton specifies dual-element construction and a 10-second response at 500% of rated current. The FRN-R-450 is also non-indicating, which is worth noting when comparing it with the fuse being replaced. Put those details together, and you have a very specific 450A fuse configuration—one in which the class, voltage, blade style, dimensions, and response specification should all align with the equipment requirements before installation.

Key Features and Benefits

• 450A Class RK5 configuration. A dual-element fuse with a non-indicating design.
• 250V AC / 125V DC rated. Both voltage ratings are specified for the FRN-R-450.
• 10-second response at 500% of rated current. This is the manufacturer-specified response figure for this catalog number.
• Blade end × blade end. Its connection style is an important physical detail when confirming the correct fuse and holder.
  

Technical Specifications

• Catalog Number: FRN-R-450
  
• Product Name: Eaton Bussmann Series FRN-R Fuse
  
• Product Type: Fuse
  
• Series: FRN-R
  
• Amperage Rating: 450A
  
• Fuse Class: Class RK5
  
• Voltage Rating: 250V AC / 125V DC
  
• AC Interrupting Rating: 200 kAIC at 250V AC
  
• DC Interrupting Rating: 20 kAIC at 125V DC
  
• Response Time: 10 seconds at 500% of rated current
  
• Number of Elements: Dual
  
• Connection: Blade end × blade end
  
• Fuse Indicator: Non-indicating
  
• Length / Depth: 10.38 in
  
• Height: 2.88 in
  
• Width: 2.88 in
  
• Product Weight: 3.1 lb
  
• Packaging Type: Standard
  
• UPC: 051712507547
  

Material Compliance and Certifications

• The supplied manufacturer information lists the FRN-R-450 as CE-marked.
  

Where It Works Best

• Equipment specifying an FRN-R-450 or an exact match to its electrical and physical characteristics.
• 450A Class RK5 fuse positions that accept blade connections and its 10.38 × 2.88 × 2.88-inch dimensions.
• 250V AC circuits where the specified 200 kAIC at 250V AC satisfies the circuit's required interrupting capacity.
• Fuse positions requiring dual-element, non-indicating construction and the stated 10-second response at 500%.