Sinofuse RS309-MF-450A RS309-MF High-Speed Square Body Fuse, 750V UL/700V IEC, 450A, Size 7TA - Pack of 2

Overview: The Sinofuse RS309-MF-450A is a high‑speed square body semiconductor protection fuse for AC/DC systems up to 700 V (IEC) / 750 V (UL). Rated 450 A, it offers very high breaking capacity for fast fault clearing in inverters, rectifiers, DC drives and DC bus protection. This item is sold as a pack of 2 units.

Key Features:

• High interrupting capacity: AC 100 kA; DC 50 kA (time constant < 15 ms)
• Square body with slotted blade tags; size code 7TA
• Bolted mounting with M10 hardware; recommended torque 21 ±1 N·m
• Complies with UL248 and IEC60269; RoHS compliant

Technical Specifications:

• Rated current: 450 A
• Rated voltage: 700 V AC/DC (IEC); 750 V (UL)
• Breaking capacity: AC 100 kA; DC 50 kA (L/R < 15 ms)
• I²t (A²s): pre‑arcing 45,100; clearing 143,000
• Power dissipation at In: 92 W
• Size code/dimensions (7TA, mm): A=129, B=49, C=72, D=89.5, E=109, F=10.5, G=38, H=6
• Installation: Blade ends, M10 bolts (21 ±1 N·m)

Applications:

• Semiconductor protection in inverters/rectifiers
• DC drives and DC common bus
• Battery charging and power conversion equipment
• Industrial power electronics requiring fast, high‑capacity fault interruption