{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT20281BB400JA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT20281BB400JA0","canonicalUrl":"https://aoctrl.com/siemens/3RT20281BB400JA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT20281BB400JA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2 contactor, AC-3, 18.5 kW at 400 V, 1NO+1NC auxiliary contacts, screw terminal.","salesMarkdown":"The Siemens 3RT20281BB400JA0 is a SIRIUS 3RT2 contactor rated for AC-3 duty at 18.5 kW on a 400 V three-phase supply, with one normally-open and one normally-closed auxiliary contact built in. AC-3 is the standard motor-switching category per IEC 60947-4-1 — this rating means it handles the inrush and breaking of squirrel-cage motors up to that power level. The 1NO+1NC auxiliary set covers basic feedback and interlocking without an add-on block.","metaTitle":"Siemens 3RT20281BB400JA0 Contactor, AC-3 18.5kW/400V, 1NO+1N","metaDescription":"Siemens 3RT20281BB400JA0 contactor, AC-3 rated 18.5 kW at 400 V, 1NO+1NC auxiliary. Current lifecycle stage: active. Available to order, quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b76a7b349e1da3e25d5253983af9e47e.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT20281BB400JA0/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT20281BB400JA0 rated for?","answer":"It is an AC-3 contactor rated at 18.5 kW at 400 V, with 1NO+1NC auxiliary contacts, designed for switching three-phase motor loads."},{"question":"Where can I buy 3RT20281BB400JA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT20281BB400JA0","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/3RT20281BB400JA0 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}}