What the MPN actually ships
The part labelled 6SL5166-8AB00-0AA0 is described on Siemens's ordering data as an S220 terminal kit, MOMO 50 mm, SMM — a 50 mm terminal block assembly for the SINAMICS S220 drive line, not a drive itself.
Sourcing class and commercial handling
Because the listing carries product class B (return restricted, contact your Siemens partner), this is not a freely-returnable stock item — it is procured against a confirmed order, which affects how MRO and panel-builder buyers should plan spares.
Why the S220 50 mm MOMO terminal kit is specified
The 50 mm MOMO designation identifies the terminal-kit variant for the S220 motor-side termination block — the kit that lands on the SINAMICS S220 power module's motor output interface and defines the bolt pattern and shroud geometry for that connection.
