Sinofuse RS309-MF-S70A High-Speed Cylindrical Bolt-Mount Fuse, 70A, 700V AC/DC IEC
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Sinofuse RS309-MF-S70A is a cylindrical bolt-mount high-speed fuse rated at 70A with an aR utilization category. Its rated voltage is 700V AC/DC under IEC and 750V DC under UL. The 3SA size uses M8 mounting bolts.
| Model | RS309-MF-S70A |
| Rated current | 70A |
| Rated voltage | 700V AC/DC (IEC); 750V DC (UL) |
| Utilization category | aR |
| Breaking capacity | 100kA AC; 50kA DC (time constant ≤15 ms) |
| Size code | 3SA |
| Pre-arcing / clearing I²t | 385 / 1,520 A²s; datasheet test values measured under DC conditions |
| Power dissipation | 18W |
| Mounting | M8 bolts; recommended torque 12 ±1 N·m |
The RS309-MF-S series datasheet identifies EV drive power systems, power conversion systems, energy storage and power systems, frequency controllers, and chargers as typical applications.
Apexon Supply supports B2B sourcing and replacement review for Sinofuse fuses. Match the model, electrical ratings, aR category, and mounting requirements to your equipment specifications before procurement.
Request a quote for Sinofuse RS309-MF-S70A with your required quantity and application details.
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