{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7954-8LL03-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7954-8LL03-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7954-8LL03-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7954-8LL03-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7, memory card for S7-1X00 CPU, 3.3 V Flash, 256 Mbyte, Flash-EPROM type, 2.1 mm depth, 24 mm width, 32 mm height.","salesMarkdown":"The Siemens 6ES7954-8LL03-0AA0 is a SIMATIC S7 memory card for S7-1X00 CPUs, using 3.3 V Flash-EPROM technology with 256 Mbyte capacity. It stores the user program, configuration data, and firmware updates for the controller. Rated for a minimum of 200 000 write/delete operations, with data retention of 10 years when the delete/write count stays under 20 000; retention drops to 1 year if the count exceeds 180 000 cycles. That endurance profile suits program storage and occasional recipe changes — not a high-frequency data-logging target. The card measures 24 mm wide, 32 mm tall, and only 2.1 mm deep — essentially the thickness of a few stacked credit cards. It plugs directly into the CPU slot; no DIN rail or panel space consumed. The 256 Mbyte capacity sits in the middle of the S7-1X00 memory card range. If your project needs more headroom for large libraries or HMI integration, the next step up is the 2 Gbyte card (6ES7954-8LL04-0AA0). For minimal programs or a spare to keep in the drawer, the 4 Mbyte card (6ES7954-8LE00-0AA0) covers basic logic. ## Integration note Compatible with S7-1200, S7-1500, and S7-1500T CPUs that accept the SIMATIC memory card form factor. Insertion is keyed; the card seats flush with the CPU face. No external power or wiring — the 3.3 V supply comes from the CPU slot. The Flash-EPROM type means the card retains data without battery backup. Use it to transfer a complete project to a replacement CPU without a PG/PC connection — pull the card from the failed unit, plug into the new one, power cycle.","metaTitle":"Siemens 6ES7954-8LL03-0AA0 SIMATIC S7 Memory Card, 256 Mbyte","metaDescription":"Siemens 6ES7954-8LL03-0AA0 SIMATIC S7 memory card for S7-1X00 CPUs. 256 Mbyte Flash-EPROM, 200k write/delete cycles, 10-year data retention. Active lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLC Accessories"],"specifications":{"Depth":"2.1 mm","Flash":"Yes","Width":"24 mm","title":"6ES7954-8LL03-0AA0","Height":"32 mm","Memory size":"256 Mbyte","description":"SIMATIC S7, MEMORY CARD FOR S7-1X00 CPU, 3,3 V FLASH, 256 MBYTE","Type of memory":"Flash-EPROM","Weight, approx.":"3 g","lifecycle_stage":"mature","Number of write/delete operations, min.":"200 000","Data retention (after final programming action), min.":"10 a; If the delete/write processes < 20 000 (1 a if the delete/write processes > 180 000)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$403.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/264a1d0d5b2fe689fcd07f00f2458b17.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1042965&mlfb=6ES7954-8LL03-0AA0"},"ai":{"faq":[{"question":"What is the memory size and type?","answer":"256 Mbyte, Flash-EPROM. It is a 3.3 V Flash memory card for SIMATIC S7-1X00 CPUs."},{"question":"What are the write endurance and data retention specs?","answer":"Minimum 200 000 write/delete operations. Data retention is 10 years if the write/delete count stays below 20 000; 1 year if the count exceeds 180 000 cycles."},{"question":"What are the physical dimensions?","answer":"Width 24 mm, height 32 mm, depth 2.1 mm. Weight approximately 3 g."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7954-8LL03-0AA0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6ES7954-8LL03-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}