SINOFUSE RS309-MF-S225A RS309-MF-S High-Speed Cylindrical Bolt Fuse, 700V IEC/750V UL, 225A aR, Size 6TA M10 - Pack of 3

Overview: The SINOFUSE RS309-MF-S225A is a cylindrical, bolt‑mounted high-speed semiconductor fuse (aR) for AC/DC systems up to 700 V (IEC) / 750 V (UL). Rated 225 A, it combines small size, low I²t, and high interrupting capability for reliable short‑circuit and backup protection in EV traction/power conversion, DC bus, chargers, inverters, rectifiers, and drives. This item is sold as a pack of 3 units.

Key Features:

• High breaking capacity: AC 100 kA; DC 50 kA (time constant ≤15 ms)
• aR utilization category for semiconductor short‑circuit protection
• Cylindrical bolt‑mount body, size code 6TA; M10 hardware
• Certified to UL248 and IEC 60269; CE and RoHS compliant
• Designed to withstand vibration/shock; wide temperature suitability

Technical Specifications:

• Rated current: 225 A
• Rated voltage: 700 V (IEC) / 750 V (UL)
• Breaking capacity: AC 100 kA; DC 50 kA (L/R ≤15 ms)
• I²t (A²s): pre‑arcing 9,200; clearing 29,900
• Power loss at In: 45 W
• Mounting: M10 bolts; recommended torque 21 ±1 N·m
• Series/size: RS309‑MF‑S, size 6TA (cylindrical bolt‑connected)

Applications:

• EV/power conversion systems, DC common bus
• Inverters, rectifiers, VFDs, chargers
• Semiconductor device and conductor short‑circuit/backup protection