LPN-RK-125SP - 125 Amp Fuse

LPN-RK-125SP - 125 Amp Fuse

Choosing the right fuse takes more than matching the amp rating. The Eaton Bussmann series LPN-RK-125SP is a 125A Class RK1 time-delay, current-limiting fuse rated for 250VAC and 250VDC, with Eaton-specified interrupting ratings of 300 kAIC at 250VAC and 100 kAIC at 250VDC. Its dual-element construction and manufacturer-identified high in-rush current motor protection are important characteristics when evaluating the fuse for compatible motor circuits and other electrical equipment. When properly selected, installed by your qualified electrical personnel, and operated within its specified ratings, the LPN-RK-125SP is built to last as part of a properly designed and maintained electrical system.

Key Features and Benefits

• 125A Class RK1 fuse: Provides the specified 125-amp rating in a Class RK1 configuration for compatible electrical equipment.
• 250VAC / 250VDC rating: Suitable for circuits requiring the manufacturer's specified AC or DC voltage rating.
• Time-delay characteristics: Designed for applications requiring time-delay fuse operation rather than relying solely on instantaneous response.
• Current-limiting design: Eaton identifies the LPN-RK-125SP as a current-limiting fuse, an important characteristic to verify during circuit-protection selection.
• Dual-element construction: Eaton specifies a two-element construction.
• High in-rush current motor protection: The manufacturer specifically identifies this as a feature of this fuse.
• Blade end × blade end connection: Gives installers a clear physical configuration to verify against the fuse holder and existing equipment.

Technical Specifications

• Manufacturer: Eaton
  
• Series: Bussmann Series LPN-RK
  
• Product Name: Eaton Bussmann Series LPN-RK Fuse
  
• Catalog Number: LPN-RK-125SP
  
• Product Type: Fuse
  
• Fuse Class: Class RK1
  
• Amperage Rating: 125A
  
• 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, according to Eaton's dedicated fuse-indicator field
  
• Special Feature: High In-Rush Current Motor Protection
  
• Manufacturer Data Note: The supplied special-features field also states "Indicating," which conflicts with the dedicated non-indicating specification
  
• Product Length/Depth: 7.13 in.
  
• Product Height: 1.61 in.
  
• Product Width: 1.61 in.
  
• Product Weight: 0.69 lb.
  
• UPC: 051712538473
  
• CE Marked: Yes
  
• RoHS Compliant: Yes
  

Material Compliance and Certifications

According to Eaton's specifications, the Bussmann series LPN-RK-125SP is CE Marked and RoHS Compliant. These manufacturer-stated compliance details provide useful reference points when checking the fuse against applicable equipment, facility, project, and material-compliance requirements.

Where It Works Best

The Eaton Bussmann LPN-RK-125SP 125A Class RK1 fuse is intended for compatible electrical equipment that requires its specific combination of 125A current rating, 250VAC / 250VDC voltage ratings, time-delay operation, current-limiting characteristics, dual-element construction, and blade-end connections. Eaton's stated high in-rush current motor protection also makes that characteristic relevant when evaluating the fuse for compatible motor circuits.