This part is a kind of semiconductor called ACS550.

Function of this product has Low voltage AC drives.

Manufacturers : ABB

Image and pinout :

Some of the text within the PDF file :

Low voltage AC drives ABB standard drives ACS550 0.75 to 355 kW / 1 to 500 hp Catalog Selecting and ordering your drive Build up your own ordering code using the type code key below or contact your local ABB drives sales office and let them know what you want. Use page 3 as a reference section for more information. Type code: ACS550 - 01 - 03A3 - 4 + B055 Product series Rating and types Voltages Construction Dimensions Options 2 ABB standard drives ACS550 | Catalog Contents ABB standard drives, ACS550 ABB standard drives Features, advantages and benefits Technical data Ratings, types, voltages and construction Dimensions Electromagnetic compatibility Assistant control panel Options Options How to select options Basic control panel Relay output extension option module Plug-in fieldbu [ ... ]

ACS550 PDF Datasheet Download