{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7953-8LJ00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7953-8LJ00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7953-8LJ00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7953-8LJ00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7 Micro Memory Card, 6ES7953-8LJ00-0AA0, Flash-EPROM 512 kbyte, for S7-300/C7/ET 200S IM151 CPU.","salesMarkdown":"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.","metaTitle":"Siemens 6ES7953-8LJ00-0AA0 S7 Micro Memory Card, 512 kbyte F","metaDescription":"Siemens 6ES7953-8LJ00-0AA0 Micro Memory Card for S7-300/C7/ET 200S CPUs. 512 kbyte Flash-EPROM, 3.3 V NFlash. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["PLC Accessories"],"specifications":{"Memory size":"512 kbyte","Type of memory":"Flash-EPROM","Weight, approx.":"50 g","lifecycle_stage":"mature","Belongs To Product":"S7-300/C7/ET 200S IM151 CPU"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$110.49","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=471096&mlfb=6ES7953-8LJ00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7953-8LJ00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What memory size does this card have?","answer":"512 kbyte of Flash-EPROM storage, sufficient for most S7-300 program and configuration data."},{"question":"Which CPUs is this card compatible with?","answer":"It fits S7-300, C7, and ET 200S IM151 CPU families that use the standard MMC slot."},{"question":"Does this card need a battery to retain data?","answer":"No. Flash-EPROM is non-volatile — data is retained without any battery."},{"question":"How do I source this obsolete part?","answer":"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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7953-8LJ00-0AA0","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/6ES7953-8LJ00-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}