The Siemens 6ES7954-8LE03-0AA0 is a SIMATIC S7 memory card built for S7-1X00 CPUs and SINAMICS drives. It stores the program and system data — think of it as the removable program carrier for the controller. At 12 Mbyte of Flash-EPROM, it holds a fair-sized project with room for firmware updates or recipe variants. Rated for 500 000 write/delete cycles minimum, and data retention of 10 years after the final programming action (derated to 1 year if you're past 450 000 cycles). That endurance matters if you're regularly swapping programs on a multi-product line — you won't wear it out in a normal production lifespan.
Siemens 6ES7954-8LE03-0AA0 SIMATIC S7 Memory Card, 12 Mbyte
MPN6ES7954-8LE03-0AA0
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Siemens SIMATIC S7, memory card for S7-1X00 CPU/SINAMICS, 3.3 V Flash-EPROM, 12 Mbyte, 500 000 write/delete cycles.
$160.02 – $325.15Ref. price · indicative, final on quote
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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications
| Parameter | Value |
|---|---|
| Depth | 2.1 mm |
| Flash | Yes |
| Width | 24 mm |
| Height | 32 mm |
| Memory size | 12 Mbyte |
| Type of memory | Flash-EPROM |
| Weight, approx. | 3 g |
| Number of write (delete operations, min.) | 500 000 |
| Data retention (after final programming action), min. | 10 a; If the delete/write processes < 50 000 (1 a if the delete/write processes > 450 000) |
Product details
Frequently asked questions
What is the memory size and type?
12 Mbyte of Flash-EPROM memory, operating at 3.3 V. It supports a minimum of 500 000 write/delete cycles and retains data for at least 10 years after final programming (1 year if write/delete cycles exceed 450 000).
What are the physical dimensions of this memory card?
Depth 2.1 mm, width 24 mm, height 32 mm. Weight is approximately 3 g.
MPN
6ES7954-8LE03-0AA0