LPJ-400SP - 400 Amp Fuse

LPJ-400SP - 400 Amp Fuse

When you're selecting a fuse for motor protection or maintaining existing electrical equipment, the details matter. The Eaton Bussmann series LPJ-400SP is a 400A Class J time-delay, current-limiting fuse rated for 600VAC and 300VDC. Eaton specifies an interrupting rating of 300 kAIC at 600VAC and 100 kAIC at 300VDC, along with a 10-second response time at 500% of rated current. When properly selected, installed by qualified electrical personnel, and operated within its specified ratings, the LPJ-400SP is built to last as part of a properly designed and maintained electrical system.

Key Features and Benefits

• 400A Class J configuration: The LPJ-400SP carries a 400-amp rating and Class J designation for compatible electrical equipment requiring these specifications.
• AC and DC voltage ratings: Eaton rates this fuse at 600VAC and 300VDC, so verify voltage compatibility before installation.
• Time-delay operation: Eaton identifies the LPJ-400SP as a time-delay fuse, with a stated response time of 10 seconds at 500% of rated current.
• Current-limiting design: The manufacturer classifies this Class J fuse as current-limiting.
• Dual-element construction: Eaton specifies a dual-element design as part of the LPJ-400SP's physical and operating configuration.
• Bolted blade connections: Uses a bolted blade end × bolted blade end connection arrangement, providing an important physical checkpoint when verifying compatibility.
• Non-indicating configuration: Eaton identifies the LPJ-400SP as non-indicating.

Technical Specifications

• Manufacturer: Eaton
  
• Product Family: Bussmann Series
  
• Product Name: Eaton Bussmann Series LPJ Fuse
  
• Catalog Number: LPJ-400SP
  
• Product Type: Fuse
  
• Fuse Class: Class J
  
• Fuse Type: Time Delay, Current-Limiting
  
• Number of Elements: Dual
  
• Amperage Rating: 400A
  
• AC Voltage Rating: 600VAC
  
• DC Voltage Rating: 300VDC
  
• AC Interrupting Rating: 300 kAIC at 600VAC
  
• DC Interrupting Rating: 100 kAIC VDC
  
• Response Time: 10 sec. at 500%
  
• Connection: Bolted Blade End × Bolted Blade End
  
• Fuse Indicator: Non-Indicating
  
• Special Feature: High In-Rush Current Motor Protection
  
• Product Length/Depth: 7.13 in.
  
• Product Height: 2 in.
  
• Product Width: 2 in.
  
• Product Weight: 1.5 lb.
  
• UPC: 051712522847
  
• CE Marked: Yes
  
• RoHS Compliant: Yes
  

Material Compliance and Certifications

According to Eaton's manufacturer specifications, the LPJ-400SP is CE Marked and RoHS Compliant. These manufacturer-stated compliance details can be useful when checking the fuse against applicable equipment, facility, or project requirements.

Where It Works Best

The Eaton Bussmann LPJ-400SP 400A Class J fuse is intended for compatible electrical systems that require its specific combination of time-delay operation, current-limiting characteristics, dual-element construction, and high in-rush current motor protection. Its manufacturer-specified characteristics make it particularly relevant when maintaining motor circuits or other compatible equipment whose documentation calls for the LPJ-400SP or matching electrical and physical specifications.