{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA9012-5AS18","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA9012-5AS18","canonicalUrl":"https://aoctrl.com/siemens/3RA9012-5AS18","factsUrl":"https://aoctrl.com/api/mcp/products/3RA9012-5AS18","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RA9012-5AS18 reversing contactor, 3-pole, 32 A, 24 VDC coil, 1NO-3NC auxiliary contacts, integral S, DIN rail mount.","salesMarkdown":"## 32 A reversing contactor, 24 VDC coil — what it does in a panel The 3RA9012-5AS18 is a Siemens reversing contactor, 3-pole, rated 32 A, with a 24 VDC coil. It includes 1NO-3NC auxiliary contacts per contactor, and the 'integral S' designation means the overload relay and contactor are factory-matched as a single assembly — no loose parts to wire up, no mis-match on the rail. This is a Motor Starters category part, so it's built for starting and reversing three-phase motors in control panels. The reversing configuration swaps two phases to reverse the motor direction — typical for conveyors, hoists, or any line that needs forward/reverse without a separate interlock relay. ## Lifecycle and sourcing — active, quoted to order No stock-holding claim — quoted per RFQ. ## What the 32 A rating means for motor duty 32 A is the continuous thermal current (Ith) for a reversing contactor in this frame size — it's the current the main poles can carry without exceeding the temperature rise limit. For AC-3 motor switching (starting and stopping a squirrel-cage motor under load), a 32 A contactor typically handles a 15–18 kW motor at 400 V, but the exact motor FLC must be checked against the contactor's AC-3 rating in the Siemens selection table. The 24 VDC coil draws a holding current in the tens of milliamps once picked — the inrush is higher but brief. The 1NO-3NC aux contacts per contactor give you one normally-open and three normally-closed auxiliary poles for status feedback or interlocking, which is useful for reversing circuits where mechanical interlocks aren't enough.","metaTitle":"Siemens 3RA9012-5AS18 Reversing Contactor, 32 A, 24 VDC","metaDescription":"Siemens 3RA9012-5AS18 reversing contactor, 32 A, 24 VDC coil, 3-pole, 1NO-3NC aux contacts. Active production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cee68187496abb5d1858f09afb7932b5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=333455&mlfb=3RA9012-5AS18","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA9012-5AS18/alternatives.json"},"ai":{"faq":[{"question":"What does the 32 A rating mean for a reversing contactor?","answer":"32 A is the continuous current rating for the main poles. For AC-3 motor duty, this typically covers motors up to about 15–18 kW at 400 V, but confirm the exact motor FLC against the Siemens AC-3 rating table for this frame."},{"question":"What are the auxiliary contacts on the 3RA9012-5AS18?","answer":"It has 1NO-3NC auxiliary contacts per contactor — one normally-open and three normally-closed poles. These are built into the reversing assembly, so no separate aux contact block is needed for basic status or interlock wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA9012-5AS18","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/3RA9012-5AS18 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}}