LPN-RK-400SP - 400 Amp Fuse

LPN-RK-400SP - 400 Amp Fuse

When you're matching a 400A fuse to existing electrical equipment, the catalog number is only the beginning. The Eaton Bussmann series LPN-RK-400SP is a 400A Class RK1 time-delay, current-limiting fuse rated for 250VAC and 250VDC. Eaton specifies an interrupting rating of 300 kAIC at 250VAC and 100 kAIC at 250VDC, with dual-element construction and a blade-end × blade-end connection. When correctly selected, installed by qualified electrical personnel, and operated within its specified ratings, the LPN-RK-400SP is built to last as part of a properly designed and maintained electrical system.

Key Features and Benefits

• 400A Class RK1 configuration: Combines a 400-amp rating with the manufacturer's specified Class RK1 design for compatible applications.
• 250VAC and 250VDC ratings: The same nominal voltage rating applies to both AC and DC applications, while the applicable interrupting ratings differ.
• Time-delay operation: Eaton identifies the LPN-RK-400SP as a time-delay fuse, an important operating characteristic to match with the equipment being protected.
• Current-limiting design: Provides the manufacturer-specified current-limiting characteristic required for appropriate applications.
• Dual-element construction: Uses Eaton's specified dual-element configuration.
• Blade end × blade end connection: Gives technicians a defined connection configuration to check when confirming physical compatibility.
• Non-indicating configuration: Eaton identifies this catalog number as non-indicating.

Technical Specifications

• Manufacturer: Eaton
  
• Product Family: Bussmann Series
  
• Product Name: Eaton Bussmann Series LPN-RK Fuse
  
• Catalog Number: LPN-RK-400SP
  
• Product Type: Fuse
  
• Fuse Class: Class RK1
  
• Amperage Rating: 400A
  
• AC Voltage Rating: 250VAC
  
• DC Voltage Rating: 250VDC
  
• AC Interrupting Rating: 300 kAIC at 250VAC
  
• DC Interrupting Rating: 100 kAIC at 250VDC
  
• Fuse Type: Time Delay; Current-Limiting
  
• Number of Elements: Dual
  
• Connection: Blade End × Blade End
  
• Fuse Indicator: Non-Indicating
  
• Special Feature: High In-Rush Current Motor Protection
  
• Product Length/Depth: 8.63 in.
  
• Product Height: 2.36 in.
  
• Product Width: 2.36 in.
  
• Product Weight: 1.75 lb.
  
• UPC: 051712538558
  
• CE Marked: Yes
  
• RoHS Compliance: Identified by Eaton as RoHS Compliant
  

Material Compliance and Certifications

According to Eaton's supplied specifications, the LPN-RK-400SP is CE Marked and RoHS Compliant. These manufacturer-stated compliance details provide useful reference points when evaluating the fuse against applicable equipment, facility, project, or regulatory requirements.

Where It Works Best

The Eaton Bussmann LPN-RK-400SP 400A Class RK1 fuse is intended for compatible electrical equipment requiring a 400A rating, 250VAC / 250VDC voltage ratings, Class RK1 configuration, time-delay operation, current-limiting characteristics, dual-element construction, and blade-end × blade-end connection. Eaton's stated high in-rush current motor protection is particularly relevant when evaluating this catalog number for compatible motor applications.