Sinofuse RS309-MF-S275A RS309-MF-S High-Speed Cylindrical Bolt Fuse, 700V IEC/750V UL, 275A aR, Size 6TA M10 - Pack of 3

Overview: The Sinofuse RS309-MF-S275A is a cylindrical, bolt‑mounted high‑speed semiconductor fuse (aR) for AC/DC systems up to 700 V (IEC) / 750 V (UL). Rated 275 A, it delivers low I²t and high interrupting capacity for fast short‑circuit protection in power electronics. This item is sold as a pack of 3 units.

Key Features:

• High breaking capacity: 100 kA AC / 50 kA DC (time constant ≤15 ms)
• aR utilization category for semiconductor short‑circuit protection
• Compact cylindrical bolt design; robust against vibration and shock
• Complies with UL248 and IEC 60269; CE and RoHS
• M10 bolted mounting; recommended torque 21 ±1 N·m

Technical Specifications:

• Rated current: 275 A
• Rated voltage: 700 V (IEC) / 750 V (UL)
• Interrupting rating: 100 kA AC; 50 kA DC (L/R ≤15 ms)
• I²t (at rated current): pre‑arcing 14,500 A²s; clearing 50,900 A²s
• Power loss at In: 53 W
• Body/size: cylindrical bolt fuse, size code 6TA; M10 terminals

Applications:

• Inverters, rectifiers, and power converters
• DC common bus, DC drives, and chargers
• EV traction/power conversion and energy storage systems
• Fast backup and short‑circuit protection of conductors and auxiliary equipment