{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7951-1KL00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7951-1KL00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7951-1KL00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7951-1KL00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-300, SIMATIC S7 memory card, Flash-EPROM, 2 Mbyte, short design, spare part.","salesMarkdown":"The Siemens 6ES7951-1KL00-0AA0 is a 2 Mbyte Flash-EPROM memory card for the S7-300 PLC family, designated as a spare part for existing installations. It stores the user program and configuration data for the CPU, loading at power-up. The short design form factor fits the standard S7-300 front slot. ## What the 2 Mbyte means for your program The 2 Mbyte capacity determines how large a user program and data blocks the CPU can hold. For a typical S7-300 application — say, a conveyor line with a few hundred rungs of ladder and a handful of function blocks — 2 Mbyte is ample. But if your application uses extensive recipe data, large DBs for array processing, or multiple FB instances, check that your compiled code size fits within this limit before committing the BOM line.","metaTitle":"Siemens 6ES7951-1KL00-0AA0 S7-300 Memory Card, 2 MB Flash-EP","metaDescription":"Siemens S7-300 memory card, 2 Mbyte Flash-EPROM, short design. Mature lifecycle spare part. Sourced to order against RFQ for legacy S7-300 installations.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC Accessories"],"specifications":{"Memory size":"2 Mbyte","Type of memory":"Flash-EPROM","Weight, approx.":"38 g","lifecycle_stage":"mature","Belongs To Product":"S7-300"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=101397&mlfb=6ES7951-1KL00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7951-1KL00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What memory type does this card use?","answer":"Flash-EPROM, which retains the program without battery backup. The CPU reads the program from this card at startup; it does not serve as working memory for runtime execution."},{"question":"Will this card work in any S7-300 CPU?","answer":"It is designed for the S7-300 family. Confirm that your specific CPU model accepts the short-design memory card format — some older CPUs use the long-design card or have a different slot orientation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7951-1KL00-0AA0","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/6ES7951-1KL00-0AA0 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}}