What it is and why it lands on a sourcing list
The ABB ACS800-04-0020-3 is a wall-mount, low-voltage AC drive in the ACS800-04 frame — a cabinet-mount member of the ACS800 family, ordered as ACS800-04-0020-3 and catalogued under Motors & Motor Controls › Drives › Motor Drives. The drive class covers standard industrial motor loads — pumps, fans, conveyors, mixers — where sensorless vector control and DTC-style motor handling are the usual selection drivers. The unit ships at 5.90 kg. On a frame-04 wall-mount that is a one-person lift into a cabinet; no panel reinforcement is the realistic call, and a single tech can set it on the backplate before torquing the mounting fasteners.