The MOSFET solution for frequency converters is designed for the harsh working conditions of industrial motor drives that operate continuously for 7 × 24 hours. It covers the entire chain of three-phase inverter bridge main power, PFC energy optimization, braking unit, and safety protection, while balancing high efficiency, high reliability, and strong anti-interference ability. It is suitable for 380V/690V industrial power grid environments.

Core selection principles
‌Voltage margin redundancy:For the 380V three-phase input scenario, the DC bus voltage can reach 540V-800V, and the rated withstand voltage of the main power MOSFET needs to be ≥ 650V, with sufficient margin reserved to cope with switch spikes and grid surges.
Low loss priority:Prioritize devices with low on resistance Rds (on) and low gate charge Qg, while reducing conduction and switching losses, improving overall efficiency and power density, and adapting to high-frequency PWM driving requirements.
‌Package matching power level:The high-power main switch adopts low thermal resistance packaging such as TO-247 and TO-263 to ensure heat dissipation; The auxiliary power supply and control circuit are packaged in compact packages such as SOP8, balancing heat dissipation capability and PCB space utilization.
‌Industrial grade reliability enhancement:Meets a wide temperature range of -55 ℃ to 175 ℃, with high avalanche resistance and strong robustness, suitable for harsh working conditions such as high temperature, high humidity, and strong vibration in industrial sites.