SINOFUSE RS309-MF-40A RS309-MF High-Speed Square Body Fuse, 700V IEC/750V UL, 40A, Size 3SA - Pack of 2

Overview: The SINOFUSE RS309-MF-40A is a high-speed square body semiconductor fuse for AC/DC applications up to 700 V (IEC) / 750 V (UL). Rated 40 A, it offers high interrupting capacity and fast fault clearing for protection of inverters, rectifiers, DC drives, and DC bus systems. 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)
• Square body with slotted blade tags; size code 3SA
• UL248 and IEC 60269 compliant; RoHS compliant
• M8 bolted mounting; recommended tightening torque 12 ±1 N·m
• Compact dimensions for panel efficiency

Technical Specifications:

• Rated current: 40 A
• Rated voltage: 700 V AC/DC (IEC); 750 V (UL)
• I²t (A²s): pre‑arcing 85; clearing 315
• Power loss at In: 11 W
• Body size/dimensions (3SA, mm): A=98, B=24, C=64, D=85, E=95.5, F=9, G=15, H=3.3
• Termination: blade ends, M8 hardware
• Interrupt ratings: AC 100 kA; DC 50 kA (L/R <15 ms)

Applications:

• Semiconductor protection in inverters and rectifiers
• DC drives and DC common bus
• Battery charging and power conversion equipment
• Industrial power electronics requiring rapid fault interruption