Product Introduction
When upgrading your SIMATIC S7 system, the Siemens 6ES7953-8LG31-0AA0 Micro Memory Card delivers reliable program storage for S7-300, C7, and ET 200 controllers. This compact card uses Flash-EPROM technology to hold 128 KB of data, ensuring your automation programs run consistently. Designed as a direct replacement or capacity upgrade for existing MMC cards, the Siemens 6ES7953-8LG31-0AA0 supports over 100,000 write/delete cycles and retains data for at least 10 years.
Technical Specifications
The Siemens 6ES7953-8LG31-0AA0 provides proven memory performance. Key parameters include:
| Parameter |
Value |
| Product type designation |
Micro Memory Card |
| Type of memory |
Flash-EPROM |
| Memory size |
128 kbyte |
| Number of write/delete operations, min. |
100 000 |
| Data retention (after final programming action), min. |
10 a |
| Belongs to product |
S7-300 / ET 200 |
| Width |
24 mm |
| Height |
32 mm |
| Depth |
1.4 mm |
| Weight, approx. |
2 g |
Industry Applications
The Siemens 6ES7953-8LG31-0AA0 serves in production lines, material handling systems, and process control stations where S7-300 or ET 200 nodes operate. Its 128 KB capacity accommodates moderate-sized logic blocks and data blocks. For instance, in a packaging line, you can store multiple recipes and sequence logic on the Siemens 6ES7953-8LG31-0AA0, while the 100,000 write cycles allow frequent program updates without concern. Retaining configuration for a decade makes this card a stable choice for OEMs and system integrators.
Maintenance & Reliability
With a minimum data retention of 10 years and 100,000 write/delete cycles, the Siemens 6ES7953-8LG31-0AA0 requires minimal maintenance. Its Flash-EPROM technology ensures no battery backup is needed, eliminating periodic battery changes. The card weighs only 2 g and fits into standard MMC slots. To maximize lifespan, avoid exposing the card to temperatures beyond its rated environment (common industrial range). Regular checks of the controller's diagnostic buffer can help identify memory errors early.
Selection Guide & Purchasing Advice
Before ordering the Siemens 6ES7953-8LG31-0AA0, verify your controller's MMC compatibility. This card works with SIMATIC S7-300, C7, and ET 200 systems that accept standard MMCs. For larger applications, consider higher-capacity cards; for simple programs, 128 KB is often sufficient. When you need genuine Siemens spares with fast delivery, visit ubest101 for competitive pricing and expert support. Ensure you have a programming device (PG/PC) to load programs onto the card.