Sinofuse RS309-MF-S80A RS309-MF-S High-Speed Cylindrical Bolt Fuse, 80A, 700V IEC/750V UL, Size 3SA - Pack of 3

Overview: The Sinofuse RS309-MF-S80A is a cylindrical, bolt-mounted high‑speed semiconductor fuse (aR) for AC/DC systems up to 700 V (IEC) / 750 V (UL). Rated 80 A, it combines small size, low I²t, and high interrupting capability for reliable short‑circuit protection in power electronics. This item is sold as a pack of 3 units.

Key Features:

• High interrupting capacity: AC 100 kA; DC 50 kA (time constant ≤15 ms)
• aR utilization category for semiconductor short‑circuit protection
• Compact cylindrical, bolt‑connected body (size 3SA); M8 mounting, 12 ±1 N·m
• Low I²t for better device protection: pre‑arc 540 A²s; clearing 2,210 A²s (80 A rating)
• Power loss at In: 20 W
• Compliance: UL248 and IEC 60269; CE and RoHS; designed for vibration/shock and wide temperature environments

Technical Specifications:

• Rated current: 80 A
• Rated voltage: 700 V (IEC) / 750 V (UL)
• Breaking capacity: AC 100 kA; DC 50 kA (L/R ≤15 ms)
• Size code: 3SA; cylindrical bolt‑mount, M8 hardware (recommended torque 12 ±1 N·m)
• Series: RS309‑MF‑S
• Intended use: EV traction/power conversion, DC common bus, chargers, inverters/rectifiers, VFDs, and DC drives

Applications:

• Semiconductor protection in inverters and rectifiers
• DC bus and energy storage/battery systems
• EV traction and industrial power conversion
• Fast short‑circuit and backup protection for conductors and auxiliary equipment