Siemens 6ES7953-8LJ00-0AA0 S7 Micro Memory Card, 512 kbyte F
Siemens S7 Micro Memory Card, 6ES7953-8LJ00-0AA0, Flash-EPROM 512 kbyte, for S7-300/C7/ET 200S IM151 CPU.
Specifications
| Parameter | Value |
|---|---|
| Memory size | 512 kbyte |
| Type of memory | Flash-EPROM |
| Weight, approx. | 50 g |
| Belongs to product | S7-300/C7/ET 200S IM151 CPU |
Product details
Frequently asked questions
What memory size does this card have?
512 kbyte of Flash-EPROM storage, sufficient for most S7-300 program and configuration data.
Which CPUs is this card compatible with?
It fits S7-300, C7, and ET 200S IM151 CPU families that use the standard MMC slot.
Does this card need a battery to retain data?
No. Flash-EPROM is non-volatile — data is retained without any battery.
How do I source this obsolete part?
Submit an RFQ. We source new-old-stock and verified surplus through our supply network — no stock on hand, but we can quote to order.
The Siemens 6ES7953-8LJ00-0AA0 is a Micro Memory Card (MMC) for S7-300, C7, and ET 200S IM151 CPU systems. It provides 512 kbyte of Flash-EPROM storage for program code, configuration data, and firmware updates, operating at 3.3 V NFlash voltage. This card plugs directly into the MMC slot on compatible CPUs — no external power or adapter needed. The Flash-EPROM type means program retention without battery backup, critical for unattended or remote panels.
Key Specs That Matter for Fit
The 512 kbyte capacity handles medium-size S7-300 programs — enough for a multi-block control logic with several function blocks and data blocks. For larger projects, Siemens offered higher-capacity MMCs (1 MB, 2 MB, 4 MB, 8 MB) in the same form factor. Flash-EPROM memory retains data indefinitely without a battery, so no scheduled battery replacement is needed. This is the standard memory type for S7-300 MMCs.