{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7138-4AA01-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7138-4AA01-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7138-4AA01-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7138-4AA01-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC DP reserve module for ET 200S, 6ES7138-4AA01-0AA0, 15 mm width, 52 mm depth, 81 mm height, 33 g, 0.025 W typ. power loss, pack of 5.","salesMarkdown":"## What this reserve module actually does in an ET 200S rack The 6ES7138-4AA01-0AA0 is a mechanical placeholder for unused slots in a SIMATIC DP ET 200S distributed I/O station — it physically fills the gap so the bus architecture stays consistent and dust doesn't collect in empty positions. It carries zero digital inputs and draws only 0.025 W typ. power loss — negligible thermal impact on the enclosure. The 15 mm width matches one standard ET 200S module slot. Each order unit is 5 pieces per packing unit, so a single line item covers five empty slots in the rack. No wiring, no configuration — just snap it onto the DIN rail. The 15 mm width is critical: if your BOM calls for a populated module at slot 4 but the actual I/O count doesn't need it, this reserve unit fills the mechanical gap and keeps the backplane bus termination correct. Sourced to order against the BOM quantity through independent distribution.","metaTitle":"Siemens 6ES7138-4AA01-0AA0 SIMATIC DP Reserve Module","metaDescription":"Siemens 6ES7138-4AA01-0AA0 SIMATIC DP reserve module for ET 200S, 15 mm width, 52 mm depth, 33 g. Active production, sourced to order. Pack of 5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"Depth":"52 mm","Width":"15 mm","title":"6ES7138-4AA01-0AA0","Height":"81 mm","description":"SIMATIC DP, 5 reserve modules for ET 200S, 15 mm width, for location reservation not used slots, 5 units per packing unit","Weight, approx.":"33 g","lifecycle_stage":"current","Power loss, typ.":"0.025 W","Number of digital inputs":"0","Wall mounting/direct mounting":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$30.86","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5444c2a6d45e12e1a825e1259ff12c7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=127894&mlfb=6ES7138-4AA01-0AA0"},"ai":{"faq":[{"question":"What is 6ES7138-4AA01-0AA0 used for?","answer":"It's a mechanical reserve module for SIMATIC DP ET 200S distributed I/O stations — fills empty slots in the rack to maintain bus architecture and keep debris out. Zero electrical function, 15 mm wide, pack of 5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7138-4AA01-0AA0","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/6ES7138-4AA01-0AA0 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}}