Siemens 6ES7953-8LL31-0AA0 MMC Memory Card

Siemens 6ES7953-8LL31-0AA0 Micro Memory Card (MMC) for SIMATIC S7-300/C7/ET 200 systems delivers 2 MB of non-volatile flash memory operable at 3.3 V. This MMC memory card is designed to augment the S7-300 family with persistent storage for PLC programs and configuration data, enabling reliable local backups and straightforward project management within the SIMATIC ecosystem. With a 2 MB capacity and 3.3 V Nflash memory, it is a compact, official Siemens accessory that fits in the SIMATIC memory architecture used by S7-300 controllers and ET 200 modules. The part number 6ES7953-8LL31-0AA0 uniquely identifies this micro memory card in Siemens' catalog, underscoring its role as an approved SIMATIC accessory for S7-300-based installations.