This Altivar 320 variable speed drive can feed 3-phase synchronous and asynchronous motors. Its compact form factor allows vertical stacking of drives inside machine frames. It works at a rated power up to 4kW / 5hp and a rated voltage from 380V to 500V AC. Its robust design with IEC 60721-3-3 class 3C3 coated printed circuit boards allows to extend machine availability in harsh environmental conditions, for example at ambient temperatures of up to 60°C without the need of additional cooling.