LPN-RK-4SP - 4 Amp Fuse

LPN-RK-4SP - 4 Amp Fuse

Choosing the right fuse takes more than matching the amp rating. The Eaton Bussmann series LPN-RK-4SP is a 4A Class RK1 time-delay, current-limiting fuse rated for 250VAC and 125VDC. Eaton specifies interrupting ratings of 300 kAIC at 250VAC and 100 kAIC at 125VDC, along with dual-element construction and a manufacturer-stated response time of 8 seconds at 500%. When correctly selected, installed by your qualified electrical personnel, and operated within its specified ratings, this fuse is built to last as part of a properly designed and maintained electrical system.

Key Features and Benefits

• 4A Class RK1 configuration: Provides the specific amperage and fuse-class combination needed when matching compatible electrical equipment.
• 250VAC and 125VDC ratings: Gives clear AC and DC voltage specifications for compatibility checks.
• Time-delay operation: Eaton classifies the LPN-RK-4SP as a time-delay fuse, an important operating characteristic when evaluating protection requirements.
• Current-limiting design: Eaton identifies the fuse as current-limiting, another essential specification for proper circuit protection selection.
• Dual-element construction: Uses Eaton's stated dual-element configuration.
• Ferrule-to-ferrule connection: Provides a clear physical connection characteristic to check when matching an existing fuse installation.
  

Technical Specifications

• Manufacturer: Eaton
  
• Product Family: Bussmann Series
  
• Product Name: Eaton Bussmann Series LPN-RK Fuse
  
• Catalog Number: LPN-RK-4SP
  
• Product Type: Fuse
  
• Fuse Class: Class RK1
  
• Amperage Rating: 4A
  
• AC Voltage Rating: 250VAC
  
• DC Voltage Rating: 125VDC
  
• AC Interrupting Rating: 300 kAIC at 250VAC
  
• DC Interrupting Rating: 100 kAIC at 125VDC
  
• Fuse Type: Time Delay; Current-Limiting
  
• Response Time: 8 sec. at 500%, as specified by Eaton
  
• Number of Elements: Dual
  
• Connection: Ferrule End × Ferrule End
  
• Fuse Indicator: Non-Indicating, according to Eaton's dedicated Fuse Indicator field
  
• Special Feature: High In-Rush Current Motor Protection
  
• Product Length/Depth: 2 in.
  
• Product Height: 0.56 in.
  
• Product Width: 0.56 in.
  
• Product Weight: 0.5 lb.
  
• UPC: 051712538213
  
• EAN: 5027590447928
  
• CE Marked: Yes
  

Material Compliance and Certifications

According to Eaton's supplied specifications, the LPN-RK-4SP is CE Marked. This manufacturer-stated compliance information provides a useful reference when evaluating the fuse against applicable equipment, facility, project, or regulatory requirements.

Where It Works Best

The Eaton Bussmann LPN-RK-4SP 4A Class RK1 fuse is intended for compatible electrical equipment requiring a 4A rating, 250VAC / 125VDC voltage ratings, Class RK1 configuration, time-delay operation, current-limiting characteristics, dual-element construction, and ferrule-end × ferrule-end connection. Eaton's stated high in-rush current motor protection is particularly relevant when evaluating this catalog number for compatible motor applications.