What this is and where it lands
The 6ES7193-4CA20-0AA0 is a screw terminal module from the Siemens SIMATIC DP TM-E15S24-A1 family, used to connect field wiring to ET 200S electronic modules. It occupies a 15 mm slot on the profile rail, with 2x4 terminal connections plus access to the AUX1 bus – continuous in this pack size. Depth is 43 mm, height 132 mm, matching the standard ET 200S envelope. Five modules ship together as one packing unit – the PO line lands five identical terminal blocks, not one.
Pack size difference you need on the BOM
The sibling 6ES7193-4CC30-0AA0 is the same terminal module – same screw terminals, same 15 mm width, same 43 mm depth – but ships one per packing unit instead of five. If your BOM calls for five modules, ordering the 4CC30 means ordering five line items; 4CA20 delivers five units as one line item. No difference in fit or wiring.