What this hard disk kit replaces
The 6ES7791-2BA02-0AA0 is a SIMATIC Field PG M5/M4 hard disk kit containing a 1 TB SATA drive, a protective cover, and a screwdriver — it is the factory-specified replacement for the internal storage in those programming devices.
Lifecycle and procurement lead time
Estimated lead time is 1-2 weeks, so for a line-down situation or a planned maintenance window, the part can be secured on a timeline that fits most urgent service calls.