Schneider Electric ATV31HU40N4A Frequency Converter

The Schneider Electric ATV31HU40N4A Frequency Converter is a 4 kW (5 HP) three‑phase variable‑frequency drive from the Altivar 31 family that precisely regulates speed and torque of 3‑phase asynchronous motors in industrial systems. It accepts 380–500 V AC input and provides 380–500 V AC output with a rated current of 9.5 A, supporting a supply frequency of 50/60 Hz and an adjustable output range of 0.5–500 Hz for smooth starting and accurate speed control in conveyors, centrifugal pumps, fans, compressors, packaging machinery, and similar manufacturing equipment. This IP20 panel‑mount drive with a heat sink uses sensorless flux vector control via PWM, an adjustable switching frequency of 2–16 kHz, and an integrated EMC filter to enhance reliability in demanding environments. The ATV31HU40N4A is designed for OEMs, maintenance teams, and system integrators working on equipment replacement, machine retrofits, energy efficiency upgrades, or new installations within the Altivar 31 range. Common replacements include the ATV320U40N4C.