FRS-R-300 - 300Amp Fuse

FRS-R-300 - 300Amp Fuse

Matching an FRS-R-300 fuse isn't as simple as finding another fuse marked 300 amps. The Eaton Bussmann FRS-R-300 is a 300A Class RK5 dual-element fuse rated for 600 VAC and 300 VDC, with separate interrupt ratings for AC and DC applications: 200 kAIC at 600 VAC and 20 kAIC at 300 VDC. If you're comparing this model with an existing fuse, the FRS-R-300 catalog number and 300A rating are useful starting points, but they're not the whole match. Check the Class RK5 designation, voltage and interrupt ratings, blade configuration, and dimensions against the equipment specifications before installation. That quick comparison helps separate the correct replacement from a fuse that may look similar but carries different electrical or physical characteristics.

Key Features and Benefits

• 300A Class RK5 rating: Gives you two important identification points—amperage and fuse class—when checking against equipment specifications.
• 600 VAC and 300 VDC voltage ratings: Provide clearly defined manufacturer ratings for compatible AC and DC equipment.
• Dual-element configuration: Matches the manufacturer's specified element design for the FRS-R-300.
• Defined response characteristic: Manufacturer data specifies a response time of 10 seconds at 500% of rated current.
• Blade-end x blade-end connection: Makes the physical connection style easy to identify when comparing replacement fuses.
• Non-indicating design: This model lacks a built-in fuse-status indicator.
• CE Marked: CE marking is identified in the supplied manufacturer specifications.
  

Technical Specifications

• Product Name: Eaton Bussmann series FRS-R fuse
  
• Catalog Number: FRS-R-300
  
• UPC: 051712508513
  
• Product Type: Fuse
  
• Class: Class RK5
  
• Amperage Rating: 300 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: 0.4 lb
  

Material Compliance and Certifications

The FRS-R-300 is CE-marked according to the supplied manufacturer information. No other material-compliance declarations or certifications were included in the provided specifications, so no additional certifications are claimed here.

Where It Works Best

The FRS-R-300 300A fuse is suited to compatible electrical equipment that specifically requires a Class RK5 dual-element fuse with blade connections and electrical ratings corresponding to this model. Its 600 VAC and 300 VDC ratings, together with the published 200 kAIC AC and 20 kAIC DC interrupt ratings, provide clear reference points when you're checking an existing fuse or reviewing equipment documentation.