SINOFUSE RS309-MF-800A RS309-MF High-Speed Square Body Fuse, 800A, 700V IEC/750V UL, Size 7TC - Pack of 2

Overview: The SINOFUSE RS309-MF-800A is a high‑speed square body semiconductor fuse for AC/DC systems up to 700 V (IEC) / 750 V (UL). Rated 800 A, it provides fast fault clearing and high interrupt capacity for inverters, rectifiers, DC drives and DC bus protection. This item is sold as a pack of 2 units.

Key Features:

• High breaking capacity: AC 100 kA; DC 50 kA (time constant <15 ms)
• aR utilization category for semiconductor short‑circuit protection
• Square body, slotted blade tags; size code 7TC
• M12 bolted mounting; recommended torque 28 ±1 N·m
• Thermal and power data for coordination: I²t (pre‑arc/clearing) 124,000/428,000 A²s; power loss 140 W

Technical Specifications:

• Rated current: 800 A
• Rated voltage: 700 V (IEC) / 750 V (UL)
• Interrupt ratings: AC 100 kA; DC 50 kA (L/R <15 ms)
• Size code/dimensions (7TC, mm): A=180, B=49, C=72, D=128.5, E=141.5, F=16, G=38, H=6
• Mounting: M12 hardware; recommended tightening torque 28 ±1 N·m
• Compliance: UL248, IEC 60269; RoHS compliant

Applications:

• Protection of power semiconductors in inverters and rectifiers
• DC common bus and DC motor drives
• Battery charging and power conversion equipment
• Industrial power electronics requiring rapid, high‑capacity fault interruption