{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6SL3120-2TE21-8AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"6SL3120-2TE21-8AA3","canonicalUrl":"https://aoctrl.com/siemens/6SL3120-2TE21-8AA3","factsUrl":"https://aoctrl.com/api/mcp/products/6SL3120-2TE21-8AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SINAMICS S120 booksize double motor module, spare part, 600 V DC input, 400 V 3 AC output, 18 A / 18 A, internal air cooling, DRIVE-CLiQ, 6SL3120-2TE21-8AA3.","salesMarkdown":"## What lands on the rack The part is the Siemens 6SL3120-2TE21-8AA3, a SINAMICS S120 booksize double motor module flagged as a spare part — it accepts a 600 V DC link and delivers 400 V three-phase output at 18 A on each of its two motor axes, which is how S120 doubles servo density inside a single slot rather than pairing two single-axis modules. It carries the line's internal air cooling, optimized pulse patterns, the extended Safety Integrated functions and a DRIVE-CLiQ cable for the digital link back to the control unit — so the slot on the rack is the only thing to plan for before the drive is commissioned. ## Reading the 18 A / 18 A rating Two 18 A channels in one module means each axis is sized as its own drive — the 400 V 3 AC output is per motor, not summed, and the upstream DC bus has to feed 36 A continuous across both inverters under simultaneous full load without sagging the link. At 400 V class the 18 A figure translates to roughly 7.5 kW per axis in a typical servo duty — the so-what for a controls integrator is that two adjacent axes on the same module share the cooling path and the DC-link capacitor bank, so thermal headroom on one channel is not independent of the other. ## Lifecycle read for the buyer The product record carries a value of mature on this SINAMICS S120 line — mature is Siemens' bracket for established product that is still orderable but no longer at the front of the new-design push, which frames this as a configured-line spare rather than a greenfield selection. The listing is dated 04.01.2021 (Änderungen vorbehalten © Copyright Siemens 2021) — that is the document revision timestamp rather than a production date, and it is the figure that travels with the declaration pack when quality doc control traces the nameplate back to the PO. ## Sourcing posture on a mature line Sourcing on a mature SINAMICS S120 module runs through the same RFQ channel as the rest of the booksize line — the BOM position gets quoted against a lead time and a price-break ladder confirmed at quote time, with no stock count or immediacy promise made here.","metaTitle":"Siemens 6SL3120-2TE21-8AA3 SINAMICS S120, 18 A/18 A","metaDescription":"Siemens 6SL3120-2TE21-8AA3 SINAMICS S120 booksize double motor module, 600 V DC input / 400 V 3 AC output at 18 A per axis. Listed lifecycle_stage mature.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drive (VFD) 600V"],"specifications":{"title":"6SL3120-2TE21-8AA3","description":"***spare part*** SINAMICS S120 Double Motor Module input: 600 V DC output: 400 V 3 AC, 18 A/18 A type of construction: booksize internal air cooling optimized pulse patterns and support of the extended Safety Integrated functions incl. DRIVE-CLiQ cable","lifecycle_stage":"mature","Datum: 04.01.2021":"Änderungen vorbehalten © Copyright Siemens 2021"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2,286.00 – $5,051.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/da517c6ed18f7e2468a5968791d1fb2e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=59765&mlfb=6SL3120-2TE21-8AA3"},"ai":{"faq":[{"question":"What is the lifecycle_stage of 6SL3120-2TE21-8AA3?","answer":"The product record lists lifecycle_stage as mature, which on the SINAMICS S120 booksize line is Siemens' bracket for established product that remains orderable but is no longer at the front of the new-design push — so this code reads as a configured-line spare rather than a greenfield selection."},{"question":"What does the 04.01.2021 datum on the listing mean?","answer":"That 04.01.2021 (Änderungen vorbehalten © Copyright Siemens 2021) entry is the document revision timestamp on the product record, not a manufacturing date — it is the number that travels with the declaration pack when the nameplate has to be reconciled back to the PO."},{"question":"What does the 18 A / 18 A rating mean on a double motor module?","answer":"It means each of the two inverters inside the module delivers 400 V three-phase output at 18 A independently — roughly 7.5 kW per axis at 400 V class in a typical servo duty — and the upstream DC link must feed 36 A continuous under simultaneous full load. Both axes share the cooling path and the DC-link capacitor bank, so thermal headroom on one channel is not independent of the other."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6SL3120-2TE21-8AA3","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/6SL3120-2TE21-8AA3 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}}