FRN-R-400 - 400Amp Fuse

FRN-R-400 - 400Amp Fuse

The FRN‑R‑400 400 Amp fuse from the trusted Fusetron line delivers high‑performance protection for demanding industrial electrical systems. With a 400 A rating, 250 VAC / 125 VDC voltage capacity, and Class RK5 classification, this dual‑element time‑delay fuse is designed to handle both sustained overloads and short‑circuit events. Its current‑limiting construction greatly reduces destructive fault energy, helping protect downstream components and reduce unplanned downtime in mission‑critical installations.

Key Features and Benefits

• Dual‑Element Design: Combines overload delay and short‑circuit protection in one compact unit, making system design simpler and safer.
• Current‑Limiting Action: Minimizes the let‑through energy (I²t) during fault events—this means less stress on equipment and a lower risk of arc‑flash incidents.
• High Ratings for Industrial Use: With a 400 A current rating and 250 VAC / 125 VDC voltage capacity, it’s built to handle heavy‑duty applications.
• Global Compliance: CE‑marked and in line with key UL and CSA standards, so you can rely on it in a variety of geographic and regulatory environments.
• Blade‑end Connections: Easy to install with blade‑end x blade‑end configuration—ideal for motor control centers, switchboards, and automation panels.

Technical Specifications

• Catalog Number: FRN‑R‑400
• UPC: 051712507530
• EAN: 5027590060813
• Amperage Rating: 400 A
• Voltage Rating: 250 VAC / 125 VDC
• Interrupting Rating:
  • 200 kA (AC)
  • 20 kA (DC)
• Response Time: ~10 seconds at 500% overload
• Fuse Class: RK5
• Connection Type: Blade end × Blade end
• Indicator Type: Non‑indicating
• Dimensions:
  • Length: 8.63″
  • Width: 2.06″
  • Height: 2.06″
• Weight: 1.6 lbs

Material Compliance and Certifications

• CE Marked: Confirms conformance with European safety and environmental health standards.
• UL and CSA: Designed according to UL and CSA regulations, assuring its suitability and reliability in North American industrial settings.

Where It Works Best

• Choose the FRN‑R‑400 for heavy‑duty electrical protection in environments such as motor control centers, HVAC systems, factory automation panels, and switchboards. Whenever you need dependable safeguarding of high‑power circuits—reducing equipment damage, lessening downtime, and improving safety—this fuse is the right solution for professionals who demand performance and reliability.