The ATV930D18N4US: The 39.2 A nominal output current is the headline number for sizing: it's the continuous current the drive can deliver to the motor at 4 kHz switching frequency under normal duty. For heavy-duty applications (constant torque, e.g., extruders or positive-displacement pumps), the continuous output derates to 31.7 A at 4 kHz — that's the number to use when the load profile demands 150 % overload for 60 seconds. The 380...480 V 3-phase input covers the common global industrial voltages; at 480 V the drive's DC bus sits around 680 V, giving headroom for motor cable voltage drop.
Compliance and standards coverage
The integrated EMC filter meets the conducted emission limits for most industrial environments without an external filter — though the optional EMC plate may be needed for the strictest radiated emission classes. The pollution degree 2 rating means it's intended for use in a controlled environment where only non-conductive pollution occurs (typical of a ventilated electrical panel).