FRN-R-4 - 4 Amp Fuse

FRN-R-4 - 4 Amp Fuse

The FRN-R-4 is a 4-amp Class RK5 dual-element fuse built around a very specific set of electrical and physical characteristics. Its response is specified at 8 seconds at 500% of rated current, a useful number when you're checking the required fuse characteristics against equipment documentation. Eaton also lists Finger safe and 7.27W power loss among the specifications for this catalog number. For an electrician or maintenance technician, that means the important identification details are all here: amperage, voltage, fuse class, interrupting ratings, response, connection style, and dimensions.

Key Features and Benefits

• 4A Class RK5 configuration. The FRN-R-4 combines a 4-amp rating with dual-element construction and a non-indicating design.
• AC and DC rated: 250V AC and 125V DC.
• Response: 8 seconds at 500%. This manufacturer-specified characteristic helps with accurate fuse selection when response behavior is part of the equipment requirements.
• Dual element, non-indicating. Both are part of the exact FRN-R-4 configuration and should be considered when replacing an existing fuse.
• Finger safe. Listed by the manufacturer as a special feature for the FRN-R-4.
• 7.27W power loss. Eaton provides this catalog-specific value, which may be relevant when reviewing equipment specifications or thermal considerations.
  

Technical Specifications

• Catalog Number: FRN-R-4
  
• Product Name: Eaton Bussmann Series FRN-R Fuse
  
• Product Type: Fuse
  
• Series: FRN-R
  
• Fuse Class: Class RK5
  
• Amperage Rating: 4A
  
• Voltage Rating: 250V AC / 125V DC
  
• AC Interrupting Rating: 200 kAIC at 250V AC
  
• DC Interrupting Rating: 20 kAIC at 125V DC
  
• Response Time: 8 seconds at 500% of rated current
  
• Number of Elements: Dual
  
• Connection: Ferrule end × ferrule end
  
• Fuse Indicator: Non-indicating
  
• Special Features: Finger safe
  
• Power Loss: 7.27W
  
• Length / Depth: 2 in
  
• Height: 0.81 in
  
• Width: 0.81 in
  
• Product Weight: 0.05 lb
  
• Packaging Type: Standard
  
• UPC: 051712507202
  

Material Compliance and Certifications

The supplied manufacturer specifications identify the FRN-R-4 as CE-marked.

Where It Works Best

• FRN-R-4 replacement positions where the equipment documentation calls for this exact catalog number and its published ratings.
• 4A Class RK5 fuse locations that accept a dual-element, non-indicating fuse.
• 250V AC circuits where the FRN-R-4's 200 kAIC interrupting rating satisfies the circuit requirements.
• Ferrule-style fuse holders that accommodate a 2 × 0.81 × 0.81-inch fuse and the specified ferrule connections.