{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5055-6AC36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5055-6AC36","canonicalUrl":"https://aoctrl.com/siemens/3RT5055-6AC36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5055-6AC36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT5055-6AC36, 36 V AC/DC coil, AC-3 rated 75 kW at 400 V, 3-pole size S6, bar connections, 2 NO + 2 NC auxiliary contacts.","salesMarkdown":"The Siemens SIRIUS 3RT5055-6AC36 is a size S6 power contactor built for switching three-phase motor loads up to 75 kW in AC-3 duty at 400 V. The 36 V AC/DC coil lets it pull in on either supply type, which simplifies panel wiring when you've got a mix of control transformers and DC power supplies on the same rail. The 3-pole main circuit handles the motor feed; the built-in 2 NO + 2 NC auxiliary contacts give you feedback and interlock wiring without bolting on a separate block. The 75 kW AC-3 rating at 400 V is the number that decides the fit for motor starting — it covers a 100 hp (roughly 75 kW) induction motor on a 400 V line, with the contactor sized to handle the inrush and break the locked-rotor current. Size S6 means a 120 mm wide footprint on the mounting plate, fastened with screws (not DIN-rail snap-on at this frame size). The bar connections accept up to 95 mm² copper at 40 °C, dropping to 70 mm² at 60 °C ambient — derate the main conductors if the panel runs hot. The 1 000 V rated insulation voltage gives headroom for 690 V motor circuits common in heavy industrial lines. The contactor can be mounted with the vertical surface rotated up to 90° or tilted 22.5° front-to-back, which helps when you're squeezing it into a tight enclosure alongside the motor starter and overload relay. Side-by-side mounting is allowed, so multiple contactors can share a common bus bar without a gap.","metaTitle":"3RT5055-6AC36 SIRIUS Power Contactor, 36 V AC/DC, 75 kW AC-3","metaDescription":"Siemens SIRIUS 3RT5055-6AC36 power contactor, 36 V AC/DC coil, rated 75 kW at 400 V AC-3, 3-pole size S6 with bar connections. Current lifecycle stage. Sourced to order against RFQ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","Substance Prohibitance (Date)":"03/01/2017"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0738db69623265f32e9fd4d4f698d908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=623949&mlfb=3RT5055-6AC36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5055-6AC36/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this contactor carry?","answer":"The part has a RoHS compliance date of March 1, 2017, confirming it meets EU substance restrictions. As a Siemens SIRIUS product, it carries CE marking and is designed to IEC 60947-4-1 standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5055-6AC36","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/3RT5055-6AC36 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}}