# Siemens SIMATIC S7-300 MMCmicro Memory Card 128KB

**URL:** https://aio.lv/en/product--siemens-6es79538lg310aa0--3444592
**Data updated:** 2026-05-22 12:33 (EEST)
**Category:** Flash Memory Cards
**Manufacturer:** Siemens
**Manufacturer code:** 6ES79538LG310AA0
**EAN:** 4047623402657
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 203.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 168.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-6es79538lg310aa0--3444592

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Siemens 6ES7953-8LG31-0AA0 is a 128KB MMCmicro memory card designed for SIMATIC S7-300, C7, and ET 200 automation systems. This reliable flash storage solution features a scratch-resistant design and a green finish, ensuring secure data storage for industrial control applications. It provides essential memory capacity for program and data management in demanding industrial environments.

## Long description

The Siemens SIMATIC S7-300 MMCmicro Memory Card with 128KB capacity is a specialized storage solution engineered for industrial automation systems. It is designed to provide reliable data retention for SIMATIC S7-300, C7, and ET 200 series controllers, ensuring that programs and configuration data remain secure during operation. This compact flash memory card is built to withstand the rigors of industrial environments, offering a stable platform for critical control tasks.
Advantages
This memory card offers high reliability and data integrity, which are essential for maintaining continuous operation in industrial settings. Its compact design allows for easy installation and removal, while the robust construction ensures resistance to physical wear. By utilizing this dedicated storage medium, users can effectively manage program updates and data logging without compromising the performance of the automation system.
Suitable for
SIMATIC S7-300 programmable logic controllers
C7 control systems
ET 200 distributed I/O systems
Industrial automation data storage
When it may not be suitable
This memory card is not suitable for applications requiring large-scale data logging or high-speed continuous writing, as its 128KB capacity is limited. It is also not compatible with newer PLC series that require different memory card formats or higher storage capacities.
Key specifications
Storage capacity: 128 KB
Technology: 3.3V Nflash
Compatibility: S7-300, C7, ET 200
Form factor: MMCmicro
How to use
To use the memory card, ensure the PLC is powered off or in a safe state as specified by the system manual. Insert the card into the designated slot on the CPU module until it clicks into place. Once inserted, the system will recognize the memory card, allowing for the transfer of project data, configuration files, or firmware updates via the programming software.
What to consider before purchase
Verify the compatibility of your specific CPU model with 128KB MMCmicro cards.
Ensure the storage capacity meets the requirements of your automation project.
Check the physical slot availability on your controller hardware.
Usage recommendations
Always handle the memory card by its edges to avoid electrostatic discharge and keep the contacts clean to ensure reliable communication with the PLC.

## Specifications

### Memory

| Feature | Value |
|---|---|
| Flash card type | MMCmicro |
| Capacity | 0.0001 GB |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.002 kg |
| Height | 24 mm |
| Width | 32 mm |
| Depth | 1.4 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 30 g |
| Package depth | 8 mm |
| Package height | 93 mm |
| Package width | 106 mm |
| Quantity per pack | 1 pc(s) |

### Other features

| Feature | Value |
|---|---|
| Compatible products | S7-300/C7/ET |

### Features

| Feature | Value |
|---|---|
| Product colour | Green |
| Protection features | Scratch resistant |

### Power

| Feature | Value |
|---|---|
| Memory voltage | 3.3 |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | Germany |

## FAQ

### How much does the Siemens 6ES7953-8LG31-0AA0 MMCmicro Memory Card 128KB cost, and is it available for purchase?

The price is 203.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 6ES7953-8LG31-0AA0 MMCmicro Memory Card 128KB be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: capacity, weight, flash card type, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Siemens 6ES7953-8LG31-0AA0 MMCmicro Memory Card 128KB?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

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