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Eaton Bussmann FRN300 - Class RK5 Fuse 300A (250V AC/125V DC)

United Fuses
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Eaton Bussmann FRN300 is a time delay dual-element Class RK5 cartridge fuse designed for overcurrent protection of motors and circuits subject to temporary surges. This 300 ampere fuse is rated for 250 volts AC and 125 volts DC, with a 200 kA interrupting rating at 250 VAC and 20 kA at 125 VDC, and provides a 10 second response time at 500% overload. It features a non-indicating blade terminal, a holder mount design, and weighs 5.19 lb, ensuring robust physical construction for industrial environments. The fuse is CE marked, complying with international safety standards for reliable circuit protection. Typical applications include protecting motor circuits, feeders, and branch circuits in industrial and commercial power distribution systems.

Key Features & Specifications
  • Type: Time Delay Dual-Element
  • Amperage: 300 A
  • Voltage: 250 V AC / 125 V DC
  • Interrupt Rating: 200 kA at 250 VAC, 20 kA at 125 VDC
  • Series/Frame: FRN-R
  • Fuse Class: RK5
  • Body Type: Cartridge
  • Terminal Type: Blade
  • Indicating: Non-Indicating
  • Mounting Type: Holder Mount
  • Response Time: 10 seconds at 500% overload
  • Weight: 5.19 lb
  • Certifications: CE Marked