SINOFUSE RS309-MF Series 700V/750V High-Speed Bolt-Mounted Fuses

SINOFUSE RS309-MF Series High-Speed Bolt-Mounted Fuses

The SINOFUSE RS309-MF Series is a cylindrical bolt-mounted high-speed fuse family designed for demanding AC and DC protection applications. The series covers current ratings from 5A to 800A and supports AC/DC 700V under IEC ratings and DC 750V under UL ratings.

RS309-MF fuses feature a compact construction, low pre-arcing I²t, high interrupting capability, and strong resistance to electrical and mechanical stress. They are suitable for applications requiring fast protection of power electronic and high-current DC systems.

Key Specifications

  • Manufacturer: SINOFUSE
  • Series: RS309-MF
  • Rated Voltage: AC/DC 700V (IEC), DC 750V (UL)
  • Rated Current Range: 5A to 800A
  • Utilization Category: aR
  • Breaking Capacity: AC 100kA, DC 50kA
  • Mounting: Bolt-mounted connection
  • Compliance: UL248, IEC 60269
  • Certifications: CE and UL
  • Environmental Compliance: RoHS

Typical Applications

  • Electric vehicle drive power systems
  • Power conversion systems
  • Battery energy storage systems
  • Power and energy systems
  • Variable frequency controllers
  • Charging equipment
  • Conductors and automotive electrical equipment
  • Short-circuit, overload, and backup protection

RS309-MF Current Ratings

The SINOFUSE RS309-MF Series is available in a broad range of current ratings from 5A to 800A, including 10A, 20A, 30A, 50A, 100A, 200A, 300A, 400A, 500A, 600A, 700A, and 800A variants.

Technical and Sourcing Support

Apexon Solutions provides sourcing support for SINOFUSE RS309-MF high-speed fuses and other industrial electrical protection products. Contact us for model availability, technical specifications, and quotation requests.

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