FRN-R-300 - 300Amp Fuse

FRN-R-300 - 300Amp Fuse

Working with a 300-amp Class RK5 fuse means there are several specifications you'll want to confirm before installation, and the FRN-R-300 provides a specific combination to check. It uses blade connections at both ends, has a non-indicating configuration, and measures 8.63 inches long, 2.38 inches high, and 2.38 inches wide. There's also a manufacturer-specified 10-second response time at 500% of rated current. So, whether you're checking an existing FRN-R-300 or working from an equipment specification, you have the electrical, physical, and response characteristics needed to make a careful compatibility check.

Key Features and Benefits

• 300A, Class RK5 – The core electrical classification for the FRN-R-300 and an essential detail when confirming the correct fuse.
• 250V AC / 125V DC rating – Published ratings cover both AC and DC use within the fuse's stated limits.
• Dual-element construction provides another important specification for comparison with the equipment requirements.
• 10 seconds at 500% of rated current – Rather than relying on a general description of fuse behavior, you have a specific response-time figure to reference.
• Blade ends on both sides make the connection configuration immediately identifiable.
• Non-indicating configuration – An important distinction when replacing an existing fuse.
  

Technical Specifications

• Catalog Number: FRN-R-300
  
• Product Type: Fuse
  
• Series: FRN-R
  
• Class: Class RK5
  
• Amperage Rating: 300A
  
• 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
  
• Special Feature: Finger safe
  
• Length / Depth: 8.63 in
  
• Height: 2.38 in
  
• Width: 2.38 in
  
• Product Weight: 1.95 lb
  
• Packaging Type: Standard
  
• UPC: 051712507516
  

Material Compliance and Certifications

The supplied specifications list the FRN-R-300 as CE-marked. No additional catalog-specific certifications or material-compliance designations were included in the provided manufacturer information.

Where It Works Best

• Existing FRN-R-300 installations where the catalog number and all circuit requirements have been confirmed.
• 300A Class RK5 fuse positions calling for dual-element construction.
• Blade-connected fuse installations that accommodate its 8.63 × 2.38 × 2.38-inch dimensions.
• Situations where a non-indicating fuse is specified.
• Equipment specifications calling for the FRN-R-300's 10-second response at 500% of rated current.